The word is a conjunction.
It is C/3rd in row because thou meaning you, shalt meaning shall, and pangs meaning pain.
Showtime i think. try it and see. i hope i helped! :)
The correct answer is A, 'introspection'. Because 'intro' means 'inside', and private thoughts are internal thoughts. 'Repartee' means 'a conversation in which clever statements are made quickly'. 'Repose' means 'to lie at rest'. And 'vigil' means 'a watch kept on the night before a religious feast'.