acquiescence

noun

1. (countable, uncountable)A silent or passive assent or submission, or a submission with apparent consent, distinguished from avowed consent on the one hand, and on the other, from opposition or open discontent; quiet satisfaction.

   “reluctant acquiescence”

   “sign of acquiescence”

   “in acquiescence with”

   “She nodded in quiet acquiescence.”

   “His acquiescence to their demands surprised everyone.”

2. (countable, uncountable)Inaction, passivity, or neglect to take legal action when it is called for in order to assert, preserve, or safeguard a right, and which inaction implies the abandonment of said right.