Definition of "Soften" :

verb: become soft or softer

"The bread will soften if you pour some liquid on it."

verb: make soft or softer

"This liquid will soften your laundry."

verb: lessen in force or effect

"Soften a shock."

verb: make less severe or harsh

verb: protect from impact

verb: make (images or sounds) soft or softer

verb: give in, as to influence or pressure