粒
リュウ, つぶ
grains, drop, counter for tiny particles
JLPT2 G7 S11 F1635
As per 立# (exert continuous downward pressure) + 米 rice → full, ripe ears of rice hanging heavily on the plant → (a) *grain* → (a) *drop*; *droplet* (← small object resembling a grain).
[Full Kanji Etymology List]