喿

zao

to chirp, to twitter

old form of 噪, chirping of birds

扌

shou

操

cao

to hold, to operate

to exercise, to drill

操刀 "wield a knife"; 操练 "to drill/train", originally military exercises

操作 "to operate" machinery or systems; 操劳 "to work hard" 

操心 "to worry", lit. "exercise the heart"

Imagine a hand (扌) gripping a rifle while soldiers chant (喿) in unison during drills.

澡

zao

to bathe, to wash

澡盆 "bathtub"; 澡身浴德 "cleanse body and cultivate virtue" – a classical self-improvement phrase

a water (氵) + the chirping (喿) sound from a tree (木) while taking a bath. Birds are known to keep a high standard of hygiene.