芽
ガ, め, じ, めぐ

bud, sprout, spear, germ

JLPT1 G4 S8 F1691

As per 牙# (mesh; cross) + 艸 grass/plant → buds that mesh → *bud* → *sprout*; *shoot* → *sign*; *beginnings*; *omen* (← buds, sprouts or shoots as harbingers of something new).

[Full Kanji Etymology List]