Synonyms of the word 
TREPID → FEARFUL - TIMID - TIMOROUS
trepid
- adj. timid, timorous, fearful.
fearful
- adj. Frightening.
- adj. (now rare) Frightened, filled with terror.
- adj. Tending to fear.
- adj. (dated) Terrible; shockingly bad.
timid
- adj. Lacking in courage or confidence.
timorous
- adj. fearful, afraid, timid.
If you are interested in words, visit the following sites :
- wiktionary.org/trepid For complete definition of a word
- 1word.ws/trepid to play with words, suffixs, prefixs, etc.