再～
さい～ · sai～ · JLPT N2 · noun
rhenium
再会 saikai = again + meet, a reunion. 再 is the prefix meaning again or re-.
再 is a prefix meaning again or re-, as in 再開 saikai (resume) and 再来 sairai (come back again). Pair it with the root word to build a new 'again' meaning.
再 — top 一 + 冂 frame + 土-like inner strokes
再 originally depicted a stack of fish or piled objects, suggesting accumulation or repetition. Over time it came to mean 'again' or 'once more,' emphasizing a second occurrence of an action. The modern form is stylized and no longer clearly pictographic.