μήποτε (= μή ποτε, and so written in WH, exc. Mat.25:9), negative particle, related to οὔποτε as μή to οὐ. __1. As neg. particle, never: Heb.9:17 (R, mg., but see infr.; WH, txt., μή τότε). __2. As conjc., lest ever, lest haply (the idea of chance rather than of time seems to prevail in NT) : Mat.4:6 (LXX) Refs Mat.5:25 7:6 13:15" (LXX)>Refs, Refs
Thayer:
1) that ... not, lest, whether perhaps, whether or not, in no way, perhaps
μήποτε, μή ποτε
mēpote mē pote
may'-pot-eh,maypot'-eh
From G3361 and G4218; notever; also if (or lest) ever (or perhaps)
KJV Usage: if peradventure, lest (at any time, haply), not at all, whether or not.
μή
mē
may
A primary particle of qualified negation (whereas G3756 expresses an absolute denial); (adverbially) not, (conjugationally) lest; also (as interrogitive implying a negative answer [whereas G3756 expects an affirmative one]); whether
KJV Usage: any, but, (that), X forbear, + God forbid, + lack, lest, neither, never, no (X wise in), none, nor, [can-] not, nothing, that not, un [-taken], without. Often used in compounds in substantially the same relations. See also G3362, G3363, G3364, G3372, G3373, G3375, G3378.
G1437 ἐάνἐάν
ean
eh-an'
From G1487 and G302; a conditional particle; incase that, provided, etc.; often used in connection with other particles to denote indefiniteness or uncertainty
KJV Usage: before, but, except, (and) if, (if) so, (what-, whither-) soever, though, when (-soever), whether (or), to whom, [who-] so (-ever). See G3361.
G1490εἰ δὲ μή ( γε )
ei de mē ( ge )
idehmay'-(gheh)
From G1487, G1161 and G3361 (sometimes with G1065 added); butifnot
KJV Usage: (or) else, if (not, otherwise), otherwise.
G3381 μήπως, μή πωςμήπως, μή πως
mēpōs mē pōs
may'-poce,maypoce
From G3361 and G4458; lestsomehow
KJV Usage: lest (by any means, by some means, haply, perhaps).
G3383 μήτεμήτε
mēte
may'-teh
From G3361 and G5037; nottoo, that is, (in continued negation) neither or nor; also, noteven
KJV Usage: neither, (n-) or, so much as.
G3385 μήτιμήτι
mēti
may'-tee
From G3361 and the neuter of G5100; whetheratall
KJV Usage: not [the particle usually not expressed, except by the form of the question].
G3387 μήτις, μή τιςμήτις, μή τις
mētis mē tis
may'-tis,maytis
From G3361 and G5100; whetherany
KJV Usage: any [sometimes unexpressed except by the simple interrogative form of the sentence].
G3756 οὐοὐ
ou
oo
Also οὐκ ouk ook used before a vowel and οὐχ ouch ookh before an aspirate.
A primary word; the absolutely negative (compare G3361) adverb; no or not
KJV Usage: + long, nay, neither, never, no (X man), none, [can-] not, + nothing, + special, un ([-worthy]), when, + without, + yet but. See also G3364, G3372.