IPA: /ˌtræmpəˈliːnɪŋ/
KK: /træmpəˈlinɪŋ/
The activity or sport of jumping and performing acrobatics on a trampoline.
She enjoys trampolining at the gym every weekend.
The action of jumping on a trampoline, often performed as a sport or recreational activity.
The children spent the afternoon trampolining in the backyard.
Past: trampolined
Past Participle: trampolined
Trampolining is derived from "trampoline" (from the French *trampolin*, meaning a small jump or springboard) and the suffix "-ing" (indicating the action or process of). The word refers to the action of performing acrobatics on a trampoline.
Think of a 'trampoline' as a springboard for jumping, and the '-ing' shows that it's the action of jumping on it.