Rarely used alone in modern Chinese — appears mostly in compounds: 震撼 (zhènhàn, to shock/awe), 撼动 (hàndòng, to shake up), and the chengyu 蚍蜉撼树 (an ant shaking a tree).
memory
扌(hand) + 感 (gǎn, to feel) — to use your hand to make something feel a strong jolt. The phonetic 感 hints at the reading hàn.
