-ltərəs, -l.trəs adjective
Etymology: alteration of Middle English advoutrous, from advoutrie + -ous
1. : of, characterized by, or given to adultery
she lived in what was legally an adulterous relation — M.R.Cohen
2. archaic : adulterated
an adulterous mixture, brewed up of nauseous ingredients — Tobias Smollett
• adul·ter·ous·ly adverb