Adjective
1. perceptible
2. dim
3. shadowy, vague, wispy, indistinct, feeble
4. weak, light
5. swooning, light-headed, lightheaded, ill, sick, indistinct
6. fainthearted
Noun
1. timid, cowardly, fearful, swoon
Verb
1. syncope, deliquium, loss of consciousness, conk
1. swoon, pass out, zonk out, pass out, black out