monosyllabic

adjective
1
having only one syllable
تک‌هجایی, یک‌هجایی, تک‌سیلابی
2
saying very little, in a way that appears rude to other people
کم‌حرف, کوتاه‌سخن, کم‌سخن, کم‌صحبت
Ralph grew increasingly monosyllabic as the evening progressed.