IPA: /kɔːˈpjuːlənsi/
KK: /kɔrˈpjuːlənsi/
The state of being overweight or having an excessive amount of body fat.
His corpulency made it difficult for him to participate in physical activities.
Corpulency is formed from "corpus" (from Latin, meaning body) and the suffix "-lency" (derived from the Latin "lentia", meaning fullness or state of being). The word refers to the state of having a large body or being overweight.
Think of 'corpus' meaning body, and '-lency' indicating a state of being — this helps you remember that corpulency refers to the state of having a large body.