mountainous adjective Stress: first syllable ๐ค Save Syllables: moun-tain-ous (3) English Definition Having many mountains; hilly and rugged. Example Sentence Nepal is a mountainous country. US IPA /หmaสntษnษs/ ๐ Listen US UK IPA /หmaสntษnษs/ ๐ Listen UK Synonyms hilly rugged craggy alpine Antonyms flat level plain Share this Word Facebook WhatsApp X Telegram Copy Link