«نَاقِصٍ عَنْهُ وَافٍ بِهِ»
Shorter in wording, yet sufficient for the intended meaning.
Adequacy (wafāʾ) is indispensable. An omission may yield effective concision when the missing element is clearly recoverable from context; an unclear or defective sentence does not become eloquent because it is short.
If asked man ḥaḍara? ('Who arrived?'), the answer Zaydun is shorter than a full verbal sentence, while the question securely supplies the omitted predicate.