IPA: /ˈdiːsənsi/
KK: /ˈdiːsənsi/
The quality of being proper, respectable, and morally good in behavior or appearance.
She showed great decency by helping the elderly man cross the street.
Decency is formed from "decent" (from Latin "decens", meaning suitable or proper) and the suffix "-cy" (meaning the state or quality of). The word "decency" refers to the state of being proper or suitable in behavior or appearance.
Think of the word 'decent' which means suitable or proper, and remember that 'decency' refers to the quality of being proper.