| agelong | (adjective) lasting through all time | - |
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| along | (adverb) in accompaniment or as a companion | - |
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| (adverb) with a forward motion | Synonyms: on |
| (adverb) in addition (usually followed by `with') | - |
| (adverb) to a more advanced state | - |
| (adverb) in line with a length or direction (often followed by `by' or `beside') | - |
| belong | (verb) be owned by; be in the possession of | - |
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| (verb) be rightly classified in a class or category | - |
| (verb) be suitable or acceptable | - |
| (verb) be in the right place or situation | Synonyms: go |
| (verb) be a part or adjunct | Synonyms: belong to |
| (verb) be a member, adherent, inhabitant, etc. (of a group, organization, or place) | - |
| daylong | (adjective) lasting through an entire day | - |
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| (adverb) during the entire day | Synonyms: all day long |
| furlong | (noun) a unit of length equal to 220 yards | - |
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| headlong | (adjective) with the head foremost | Synonyms: headfirst |
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| (adjective) excessively quick | Synonyms: hasty |
| (adverb) with the head before the body | Synonyms: headfirst |
| (adverb) in a hasty and foolhardy manner | Synonyms: rashly |
| (adverb) at breakneck speed | Synonyms: precipitately |
| hourlong | (adjective) lasting for an hour | - |
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| lifelong | (adjective) continuing through life | Synonyms: womb-to-tomb |
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| livelong | (adjective) (of time) constituting the full extent or duration | - |
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| (noun) perennial northern temperate plant with toothed leaves and heads of small purplish-white flowers | Synonyms: live-forever, orpin, orpine, Sedum telephium |
| long | (adjective) good at remembering | Synonyms: recollective, retentive, tenacious |
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| (adjective) primarily spatial sense; of relatively great or greater than average spatial extension or extension as specified | - |
| (adjective) primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified | - |
| (adjective) (of speech sounds or syllables) of relatively long duration | - |
| (adjective) holding securities or commodities in expectation of a rise in prices | - |
| (adjective) having or being more than normal or necessary | - |
| (adjective) planning prudently for the future | Synonyms: farseeing, farsighted, foresighted, foresightful, longsighted, prospicient |
| (adjective) of relatively great height | - |
| (adjective) involving substantial risk | - |
| (adverb) for an extended time or at a distant time | - |
| (adverb) for an extended distance | - |
| (verb) desire strongly or persistently | Synonyms: hanker, yearn |
| monthlong | (adjective) last through a month | - |
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| nightlong | (adjective) lasting, open, or operating through the whole night | Synonyms: all-night, overnight |
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| oblong | (adjective) deviating from a square or circle or sphere by being elongated in one direction | - |
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| (adjective) (of a leaf shape) having a somewhat elongated form with approximately parallel sides | - |
| (noun) a plane figure that deviates from a square or circle due to elongation | - |
| oolong | (noun) Chinese tea leaves that have been partially fermented before being dried | - |
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| prolong | (verb) lengthen in time; cause to be or last longer | Synonyms: draw out, extend, protract |
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| (verb) lengthen or extend in duration or space | Synonyms: keep up, sustain |
| sidelong | (adjective) inclining or directed to one side | - |
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| (adjective) (used especially of glances) directed to one side with or as if with doubt or suspicion or envy | Synonyms: askance, askant, asquint, squint-eyed, squint, squinty |
| (adjective) situated at or extending to the side | Synonyms: lateral |
| (adverb) to, toward or at one side | Synonyms: obliquely, sideways |
| (adverb) with the side toward someone or something | - |
| (adverb) on the side | - |
| singalong | (noun) informal group singing of popular songs | Synonyms: singsong |
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| tagalong | (noun) someone who persistently (and annoyingly) follows along | Synonyms: hanger-on |
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| weeklong | (adjective) lasting through a week | Synonyms: seven-day |
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| yearlong | (adjective) lasting through a year | - |
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