From Greek 'mneme' (memory), from PIE *men- (to think) — the silent 'm' preserves the ancient root's nasal form.
Aiding or designed to aid the memory; relating to the technique of improving memory through systematic methods. Also used as a noun: a device or pattern used as an aid to memory.
From Greek 'mnēmonikos' (of or pertaining to memory), from 'mnēmōn' (mindful, remembering), from 'mnēmē' (memory), from the root 'mnā-,' from PIE *mneh₂- (to remember), itself a derivative of *men- (to think). The initial 'mn-' cluster, preserved in Greek and in the English spelling, reflects the nasal-grade form of the PIE root. The silent 'm' in English pronunciation is a remnant of this ancient cluster that was speakable in Greek but
In Greek mythology, Mnemosyne (Μνημοσύνη) — whose name comes from the same root as 'mnemonic' — was the goddess of memory and the mother of the nine Muses. The Greeks placed memory at the origin of all art and knowledge: without Mnemosyne, there could be no poetry, no history, no music. The Muses were literally the children of remembering.