零

Phono-semantic compound (形聲 /形声, OC *riːŋ, *reːŋ, *reːŋs): semantic 雨 (“rain”) + phonetic 令 (OC *ren, *reŋ, *reŋs, *reːŋ, *reːŋs). On the oracle bone script, only thick raindrops are depicted falling from the sky.

Unclear. Schuessler (2007) proposes several possibilities:

* From Austroasiatic; compare Khmer ភ្លៀង (phliəng, “rain”), from Proto-Mon-Khmer *(p)liɲ ~ *(p)liəɲ ~ (p)liiɲ (“sky, rain”).

* Possibly related to Jingpho marang (“rain”), for which STEDT sets up Proto-Sino-Tibetan *m/s-raŋ (“rain”). Starostin also relates it to this Jingpho word and sets up Proto-Sino-Tibetan *rēŋ (“to drop”), also comparing Tibetan སྤྲིན (sprin, “cloud”) and Burmese ရည် (rany, “liquid; juice”).

* Possibly related to 隕 (OC *ɢunʔ, “to drop”) and 霣 (OC *ɢunʔ, “to rain; to fall down like rain”) if one assumes Proto-Sino-Tibetan *r/s/g-wa (“water; rain”) (or its variant *rwe-) can be simplified to *re- and *we-.

The character was later repurposed in 1248 by mathematician Li Ye as a placeholder, extending from its a little bit (of rain) meaning to indicate a bit more remaining. In Li Ye's notation, a number like 302 would be represented as 三百零二 (èr), literally three hundred and remaining two, with the 零 character used as a means of skipping the tens place, by indicating zero tens. It would thus implicitly take on the meaning of zero.