| berk | (noun) a stupid person who is easy to take advantage of | - |
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| berkelium | (noun) a radioactive transuranic element; discovered by bombarding americium with helium | Synonyms: atomic number 97, Bk |
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| berserk | (adjective) wildly frenzied and out of control | Synonyms: amok, amuck |
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| (noun) one of the ancient Norse warriors legendary for working themselves into a frenzy before a battle and fighting with reckless savagery and insane fury | Synonyms: berserker |
| berserker | (noun) one of the ancient Norse warriors legendary for working themselves into a frenzy before a battle and fighting with reckless savagery and insane fury | Synonyms: berserk |
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| clerk | (noun) an employee who performs clerical work (e.g., keeps records or accounts) | - |
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| (noun) a salesperson in a store | Synonyms: salesclerk, shop assistant, shop clerk |
| (verb) work as a clerk, as in the legal business | - |
| clerking | (noun) the activity of recording business transactions | Synonyms: bookkeeping |
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| clerkship | (noun) the job of clerk | - |
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| gherkin | (noun) small prickly cucumber | - |
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| (noun) any of various small cucumbers pickled whole | - |
| hauberk | (noun) a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor | Synonyms: byrnie |
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| hyperkalemia | (noun) higher than normal levels of potassium in the circulating blood; associated with kidney failure or sometimes with the use of diuretic drugs | - |
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| jerk | (noun) an abrupt spasmodic movement | Synonyms: jerking, jolt, saccade |
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| (noun) a sudden abrupt pull | Synonyms: tug |
| (noun) raising a weight from shoulder height to above the head by straightening the arms | - |
| (noun) meat (especially beef) cut in strips and dried in the sun | Synonyms: jerked meat, jerky |
| (noun) a dull stupid fatuous person | Synonyms: dork |
| (noun) (mechanics) the rate of change of acceleration | - |
| (verb) make an uncontrolled, short, jerky motion | Synonyms: twitch |
| (verb) throw or toss with a quick motion | Synonyms: flick |
| (verb) pull, or move with a sudden movement | Synonyms: yank |
| (verb) move with abrupt, seemingly uncontrolled motions | Synonyms: twitch |
| (verb) jump vertically, with legs stiff and back arched | Synonyms: buck, hitch |
| jerker | (noun) someone who gives a strong sudden pull | Synonyms: yanker |
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| jerkily | (adverb) with jerking motions | - |
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| (adverb) with spasms | Synonyms: spasmodically |
| jerkin | (noun) a tight sleeveless and collarless jacket (often made of leather) worn by men in former times | - |
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| jerkiness | (noun) the quality of being spasmodic and irregular | Synonyms: fitfulness |
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| jerking | (adjective) lacking a steady rhythm | Synonyms: arrhythmic, jerky |
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| (noun) an abrupt spasmodic movement | Synonyms: jerk, jolt, saccade |
| jerkwater | (adjective) small and remote and insignificant | Synonyms: one-horse, pokey, poky |
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| jerky | (adjective) having or revealing stupidity | Synonyms: anserine, dopey, dopy, foolish, gooselike, goosey, goosy |
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| (adjective) marked by abrupt transitions | Synonyms: choppy |
| (adjective) lacking a steady rhythm | Synonyms: arrhythmic, jerking |
| (noun) meat (especially beef) cut in strips and dried in the sun | Synonyms: jerk, jerked meat |
| kilderkin | (noun) an obsolete British unit of capacity equal to 18 Imperial gallons | - |
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| meerkat | (noun) a mongoose-like viverrine of South Africa having a face like a lemur and only four toes | Synonyms: mierkat |
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| mierkat | (noun) a mongoose-like viverrine of South Africa having a face like a lemur and only four toes | Synonyms: meerkat |
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| overkill | (noun) any effort that seems to go farther than would be necessary to achieve its goal | - |
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| (noun) the capability to obliterate a target with more weapons (especially nuclear weapons) than are required | - |
| paperknife | (noun) dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books | Synonyms: letter opener, paper knife |
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| perk | (noun) an incidental benefit awarded for certain types of employment (especially if it is regarded as a right) | Synonyms: fringe benefit, perquisite |
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| (verb) gain or regain energy | Synonyms: gain vigor, percolate, perk up, pick up |
| perkily | (adverb) in a perky manner | - |
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| perkiness | (noun) inappropriate playfulness | Synonyms: archness, impertinence, pertness, sauciness |
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| (noun) cheerfulness that bubbles to the surface | Synonyms: buoyancy |
| perky | (adjective) characterized by liveliness and lightheartedness | Synonyms: buoyant, chirpy |
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| salesclerk | (noun) a salesperson in a store | Synonyms: clerk, shop assistant, shop clerk |
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| sauerkraut | (noun) shredded cabbage fermented in brine | - |
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| schipperke | (noun) breed of small stocky black dogs originally used as watchdogs on boats in the Netherlands and Belgium | - |
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| tearjerker | (noun) an excessively sentimental narrative | - |
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| twerk | (verb) to dance with thrusting hip movements and a low squatting stance | - |
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