For the terrible one
`ariyts  (aw-reets')
fearful, i.e. powerful or tyrannical -- mighty, oppressor, in great power, strong, terrible, violent.
is brought to nought
'aphec  (aw-face')
to disappear, i.e. cease -- be clean gone (at an end, brought to nought), fail.
and the scorner
luwts  (loots)
ambassador, have in derision, interpreter, make a mock, mocker, scorn(-er, -ful), teacher.
is consumed
kalah  (kaw-law')
to end, whether intransitive (to cease, be finished, perish) or transitived (to complete, prepare, consume)
and all that watch
shaqad  (shaw-kad')
to be alert, i.e. sleepless; hence to be on the lookout (whether for good or ill) -- hasten, remain, wake, watch (for).
for iniquity
'aven  (aw-ven')
to come to naught); strictly nothingness; also trouble. vanity, wickedness; specifically an idol
are cut off
karath  (kaw-rath')
to cut (off, down or asunder); by implication, to destroy or consume; specifically, to covenant