1. from trepidus "alarmed, scared," from PIE *trep- "shake, tremble", related to *trem- (see tremble).
2. tremble => trep- => trepid.
3. 音：踹屁的----被踹屁股的
- trepid (adj.)
- "trembling from fear or terror," 1640s, from Latin trepidus "scared" (see trepidation). Related: Trepidly; trepidness.
