The katakana syllable ドゥ (du). Its equivalent in hiragana is どぅ (du).

to use / to employ / to make use of, to apply / to spend

(music) Abbreviation of ギター (gitā, “guitar (of a rock band)”).

a guitar

a sound / when used with a "hear" verb, a rumor or fame / news, tidings / a reply, response

sound; echo; voice

adverbial form of よい (yoi, “good”) / adverbial form of いい (ii, “good”) / 良く, 善く, 克く: good, well / 良く: frequently, often / 良く, 善く: having astonishing ability or guts / 能く: (literary) able to

浴室: bathroom

well done; good job

(emphatic) Alternative form of よく (yoku)