构用 (gòu yòng) is an adjective meaning 'sufficient for use' or 'adequate for the intended purpose.' It combines 构 (gòu), which here carries the sense of 'to constitute' or 'to amount to,' and 用 (yòng), meaning 'use' or 'function.' Together, they convey that something meets the minimum functional requirement—neither excessive nor deficient. This term is used primarily in technical, agricultural, or veterinary contexts, especially when evaluating whether animals, feed, equipment, or resources meet baseline operational standards.

It often appears in formal reports, livestock management guidelines, or resource assessments—for example, determining whether a herd size 'constitutes sufficient use' of pasture land, or whether a breeding stock 'is sufficient for use' in a conservation program. Unlike common adjectives like 足够 (zúgòu), 构用 sounds more specialized and objective, implying a predefined threshold rather than subjective adequacy.