Noun
relinquishing -
the act of giving up and abandoning a struggle or task etc.
relinquishment
ending ,
termination ,
conclusion the end of a word (a suffix or inflectional ending or final morpheme); "I don't like words that have -ism as an ending"
ceding ,
cession the act of ceding
handover act of relinquishing property or authority etc; "the handover of occupied territory"
relinquishing -
a verbal act of renouncing a claim or right or position etc.
relinquishment
renouncement ,
renunciation the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)