entries → 下降
TSUMUGU · TOCFL 5 (est.) · 詞
下降 word · TOCFL 5 (est.)
下降 ＝ 下 ＋ 降
ㄒㄧㄚˋ ㄐㄧㄤˋ · xiàjiàng
verb — to drop; to descend; to fall

字源 FORM — what the parts do

下down, below (上下)xià
降to descend, lower (降落)jiàng
下降，上下的下，降落的降。
關 · Related
降落jiàngluòto land, to come down — the same 降上升shàngshēngto rise — the opposite