from 1 (as a negative particle) and a presumed derivative of 2508 (meaning cleansed)
Source:
TDNT - 3:427,381
Kind:
adj
In AV:
unclean 28, foul 2
Count:
30
Definition:
1) not cleansed, unclean
1a) in a ceremonial sense: that which must be abstained from
according to the levitical law
1b) in a moral sense: unclean in thought and life