The headword is present indicative active, third person singular, of maima/ssw. Its earliest occurrence is in Jeremiah 4:19 LXX. LSJ s.v. expresses uncertainty about the verb's meaning in that passage, and whether it does mean the same as maima/w. If it does, the verse reads "my soul quivers, my heart breaks, I will not be silent" (cf. NIV: "my heart pounds within me, I cannot keep silent": "my soul quivers" appears absent in the Masoretic text).
The first two of the eight glossing verbs correspond closely to Hesychius s.v. (mu78). The final four are added in other lexica: see the references at Photius mu30 Theodoridis. The Lexicon on Gregory Nazianzus' Speeches (Gr. cites Jeremiah in To the citizens of Nazianzus: PG 35.965) omits "tumbles". The Suda's contribution is "is consumed, is spent", which may be guesswork based on the context.