tremble, shake, shudder, shiver. There is another word “quiver” in English which means a case for holding arrows. 承cheng2 is a quiver for holding arrows. 颤chan4 means quiver as in shake.
Memory Trick SAN FRAN they had a CHAN DOU 颤抖
San Francisco has lots of overseas Chinese 华侨 but also had a terrible earthquake way back in 1906 and another big one in 1989.
颤 wHUIrlpool回, DAwN旦 under a lid.
https://hanziyuan.net/#%E9%A2%A4
Left side is a pictogram of a silo㐭lǐn on top of dawn as symbol of sincere.
https://hanziyuan.net/#%E4%BA%B6
https://hanziyuan.net/#%E4%BA%B6
Right side is the face of a person. A sincere person shivers when cold.
抖 hanDDipper DOU