落实
luòshí · HSK 5
make sure
✅ 落 = fall/land + 实 = solid/real → land it for real (make concrete)
落 means to fall or land; 实 means solid, real, or substantial. Together: to bring something down to solid ground — i.e. nail it down, finalise, make sure it actually happens rather than staying abstract.
落 — grass radical 艹 + 洛 (water 氵 + 各)
Originally written with the grass radical 艹 over 洛, depicting leaves falling from plants. 洛 serves as the phonetic component (giving the luò sound) while 艹 supplies the meaning of vegetation. The sense extended from 'leaves falling' to the general meaning of falling, dropping, or settling down.