underestimate
/ˌʌndərˈestɪmeɪt ˌअन्डर्ˈएस्टिमेट्/ verb [T] 1 to guess that the amount, etc. of something will be less than it really is किसी वस्तु की मात्रा आदि को वास्तविकता से कम आँकना
2 to think that somebody/something is not as strong, good, etc. as he/she/it really is किसी की शक्ति, गुणवत्ता आदि को वास्तविकता से कम समझना
Don’t underestimate your opponent. He’s a really good player.
✪ विलोम overestimate