落

Phono-semantic compound (形聲 /形声, OC *ɡ·raːɡ): semantic 艹 + phonetic 洛 (OC *ɡ·raːɡ).

From Proto-Sino-Tibetan *klaʔ (“to fall”) (STEDT under PTB *(k/g)la-k/y/t, Schuessler, 2007):

:within Sinitic, cognate to 露 (OC *ɡ·raːɡs) "dew", 下 (OC *ɡraːʔ, *ɡraːs, “down, below, to descend, to fall down”) , 陊 (OC *l'aːlʔ, *l'alʔ) "to collapse" and 阤 (OC *l'alʔ, *hljalʔ) "hillside, slope";

:outside of Sinitic, cognate to Mizo tla ~ tlâk (“to fall”) and thla ~ thlâk (“to drop”), Burmese ကျ (kya., “to fall”) and ချ (hkya., “to drop”).

Schuessler attributes OC *r-, instead of expected **l-, to possible Austroasiatic influence: compare Khmer [script needed] (gra'ka, “be low, debased”) < [script needed] (-ra'ka, “to fall, below, cover from above”). However, Matisoff (2003) identifies several ST etyma which display TB *(C‑)l- vs. OC *(C‑)r‑ correspondence (e.g. *l(j)a(k/ŋ) (“good, beautiful”) → 良 (OC *raŋ), *g/m-liŋ (“neck”) → 領 (OC *reŋʔ), etc.) and TB *(C‑)r- vs. OC *(C‑)l‑ (e.g. *g-rjum (“salt”) → 鹽 (OC *ɡ·lam)); so irregularities in correspondence do not necessarily indicate foreign influences.

Contemporary southern usage possibly reinforced by a Kra-Dai term. The term has been associated with Zhuang loengx (“to fall”).

Zhengzhang suggested that Pronunciation 2 was a result of loss of final consonant of the retained Old Chinese Pronunciation 1.