not
painful
unhealthy, harmful
abnormal
difficult
poor, deficient
to fail
incorrect
inability, unable
malady, disease
bad
not
do the opposite of, reverse (a specified action)
contrary to or contrasted against traditional norms; unconventional; alternative
Used to form temporary names of elements (such as unbiunium) whose existence has been predicted, and have not yet been given a trivial name.
absent; lacking; not; negative
deprive of, release from, free from, remove from, extract from
intensifying a verb that already suggests opposition or removal
Used to form large numbers as the first in the sequence.