Aid, allow,assist,help,permit these are all the opposite of outflank.
All triangles have 3 straight sides.
It would be oral guidance.
"the moment he opened his mouth, I cringed at the sound." and "my father was a strong man . . " They both represent that the author is afraid of their father and that he left a strong impression on the author idea of the way a father should be. Hope this helps :)