(of the way in which something is said) flatly / (of the way in which something is said) coldly

(of the way in which something fits together) perfectly / (of the way in which something fits together) just right

(of the way in which something is struck) with a whip / (of the way in which something is struck) with a crack / (of the way in which something is struck) with a snap

(of the sound produced by something striking something else) whip / (of the sound produced by something striking something else) crack / (of the sound produced by something striking something else) snap

(of the way in which a tree branch breaks) in a splitting manner

(of the sound produced by a tree branch as it breaks) crack / (of the sound produced by a tree branch as it breaks) split

exactly / [guess *something and] hit the nail on the head / to a T / on the mark / [five o'clock] sharp / [guess *something and be] right on the nose

exactly / to a T

exactly / closely / tightly

on the square / properly / finely