One doesn't require an expert to tell one what one already knows.

Alternative form of on the contrary

plural of letter to the editor

(intransitive) To assemble; to congregate. / (intransitive, figuratively) To harmonize socially; to come to an amicable agreement; to ally or band together. / (intransitive) To meet.

(soccer) a central midfielder who plays both defensively and attackingly, who runs a lot up and down the pitch.

plural of mouth-to-mouth resuscitation

Used other than figuratively or idiomatically: see hard, nut, crack. / (idiomatic) A problem that is challenging to solve.

Used to assert the defensibility or advisability of what follows.

plural of hard nut to crack

present participle of send to Coventry