obverse
noun
[ ˈɒbvəːs ]
• the side of a coin or medal bearing the head or principal design.
• the opposite or counterpart of a fact or truth.
• "true solitude is the obverse of true society"
obverse
adjective
• of or denoting the obverse of a coin or medal.
• corresponding to something else as its opposite or counterpart.
• "the obverse fates of the principals"
• narrower at the base or point of attachment than at the apex or top.
• "an obverse leaf"
Origin:
mid 17th century (in the sense ‘turned towards the observer’): from Latin obversus, past participle of obvertere ‘turn towards’ (see obvert).