entries → 伺
TSUMUGU · C1 (est.) · 字
伺 character · C1 (est.)
伺 ＝ 亻 ＋ 司
ㄙˋ · sì
verb — to watch for, to wait upon, to lie in wait

字源 FORM — what the parts do

亻義a person
司聲gives the soundsī — also to manage, to keep watch over; drifted to sì
Tsī → sì — tone shifted off the donor
A person (亻) and 司, to take charge, to keep watch — 司 carries the sound sī, tipped to sì. Together: a person keeping watch, waiting on or watching for the moment. From there: 伺候 to wait upon, 伺機 to bide one's time, 窺伺 to spy out. 司 leans toward meaning as well as sound — the keeping-watch.
意 · Meanings
(本義)伺候、守候— to wait upon, to attend常用
→伺機、窺伺— to watch for one's chance, to lie in wait
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
司sīthe sound it carries — 司 alone is to manage, an office; 伺 adds 亻 for the one watching and waiting飼＝ 食 ＋ 司sìthe 司 it shares — 飼 sets 司 beside food 飠 for to feed (an animal)