"turned toward the observer, frontal," 1650s, from Latin obversus "turned against, directed toward," past participle of obvertere "to turn toward or against," from ob "toward" (see ob-) + vertere "to turn" (see versus). According to OED, not in common use until the end of the 18th century. The noun, in reference to coins, medals, etc. (opposite of reverse), is attested from 1650s. Related: Obversely.
例文
1. The obverse of rising unemployment is continued gains in productivity.
失業率が上昇したのに対し、生産性がさらに向上した。
2.The obverse of love is hate.
愛の反対側は憎しみである。
3.We should see the reverse as well as the obverse of things.
物事の正面だけでなく、裏側も見なければならない。
4.The head of the Queen appears on the obverse of British coins.
英国硬貨の正面に女王の顔がある。
5.We must see the reverse as well as the obverse side of things.