The kanji 残 (zan) primarily conveys the idea of "remaining," "leftover," "the rest," or "to be left." It implies something that is not completely used, consumed, or taken away. It can also suggest the presence of something that continues to exist after the majority is gone or used up.

・On-yomi (音読み): ザン (zan) ・Kun-yomi (訓読み): のこ（る） (noko(ru): to remain, to be left), のこ（す） (noko(su): to leave behind)

⚫︎残り物 (nokorimono) Translation: leftovers ⚫︎残念 (zannen) Translation: disappointing; regrettable ⚫︎残留 (zanryuu) Translation: remaining; staying behind

The kanji 残 is a phono-semantic compound (形声文字). The left side is the radical 歹 (gatsu), meaning "death," "decay," or "remains" (often associated with things that are left after something is gone). The right side is 戉 (etsu or mitsu), which originally depicted a type of axe. Together, the components suggest something that has been chopped or broken leaving only the remaining parts or fragments. Over time, the meaning shifted to encompass anything that remains or is left over.