noun
watt
Unit of power in the International System of Units (SI). Used in scientific, technical, and everyday contexts for electrical and mechanical power.
この電球は60ワットです。
This light bulb is 60 watts.
新しいスピーカーは出力が100ワットある。
The new speaker has an output of 100 watts.
From English 'watt', named after Scottish engineer James Watt.