Monster = 怪物 [guài wù]
The Loch Ness Monster turns out to be an elephant wading through the lake with a monster head on its trunk. The part above the water is the 怪物.
怪物 (guài wù) means “monster.” 怪 is strange and 物 is a thing or creature: a strange creature. The Loch Ness Monster is 尼斯湖水怪 (Nísī Hú shuǐguài), where 水怪 is a water monster.
我不怕怪物。 — Wǒ bú pà guàiwù. — I am not afraid of monsters.
湖里有怪物吗？ — Hú li yǒu guàiwù ma? — Is there a monster in the lake?