through thick and thin
Definition of through thick and thin
: through many difficult times over a long period She stood by me through thick and thin.
From the M-W Editors
Word by Word Definitions
: 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
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