through thick and thin

: having or being of relatively great depth or extent from one surface to its opposite

: heavily built : thickset

: close-packed with units or individuals

: in a thick manner : thickly

: the most crowded or active part

: the part of greatest thickness

: having little extent from one surface to its opposite

: measuring little in cross section or diameter

: not dense in arrangement or distribution

: to make thin or thinner:

: to reduce in thickness or depth : attenuate

: to make less dense or viscous

: in a thin manner : thinly