Answer: stales

AnswerCrossword Clue
STALES

Grows boring.

STALES

Becomes hard and dry, as bread

STALES

Becomes wearisome

STALES
Becomes old-hat
STALES
Goes flat.
STALESBecomes wearisome.
STALESLoses freshness.
STALESGets out of condition.
STALESBecomes old and dry.
STALESLoses freshness
STALESBecomes trite.
STALESGets old
STALESGoes bad
STALESGets hard, as bread
STALESGrows old, as a joke
STALESGoes flat
STALESGoes uneaten too long