Resembling a gazelle in appearance, movement, or grace; elegant and swift in a way similar to a gazelle.
From 'gazelle' plus the suffix '-like' (meaning 'resembling'), a straightforward descriptive compound following the standard English pattern of comparing things to animals.
The '-like' suffix is one of the most transparent in English—you can put it after almost any noun and instantly create a new adjective, which is why writers constantly make new '-like' compounds.
Complete word intelligence in one call. Free tier — 50 lookups/day.