| pertain | (verb) be a part or attribute of | Synonyms: appertain |
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| (verb) be relevant to | Synonyms: bear on, come to, concern, have to do with, refer, relate, touch, touch on |
| perturb | (verb) throw into great confusion or disorder | Synonyms: derange, throw out of kilter |
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| (verb) disturb in mind or make uneasy or cause to be worried or alarmed | Synonyms: cark, disorder, disquiet, distract, trouble, unhinge |
| (verb) cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull | - |
| (verb) disturb or interfere with the usual path of an electron or atom | - |