Should he reason
yakach (yaw-kahh')
to be right (i.e. correct); reciprocal, to argue; causatively, to decide, justify or convict
with unprofitable
cakan (saw-kan')
to be familiar with; by implication, to minister to, be serviceable to, be customary
talk
dabar (daw-baw')
a word; by implication, a matter (as spoken of) or thing; adverbially, a cause
or with speeches
millah (mil-law')
a word; collectively, a discourse; figuratively, a topic -- + answer, by-word, matter, any thing (what) to say, to speak(-ing), speak, talking, word.
wherewith he can do no good
ya`al (yaw-al')
to ascend; figuratively, to be valuable (objectively: useful, subjectively: benefited) -- at all, set forward, can do good, (be, have) profit, (able).
