嫩芽 is read as どんが (donga) and means bud.
どんが
donga
きのめ
bud of Japanese pepper tree (Xanthoxylum piperitum)
め
germinal disk (in an egg)
はつが
germination
ほうが
early sign
しんめ
sprout
ばくが
malt
むせいが
gemma
しゅつが
そくが
lateral bud
はめ
leaf bud
めばえ
bud
めばえる
to arise