Japanese · Pronunciation Guide
a-ru-ku, three beats — the middle u is voiced, the final one usually isn't.
aruku
Three identical slots, unaccented, so the pitch rises off the first and holds level. The two u's are instructive: they're the same vowel, but one is fully voiced and the other is whispered, purely because of what surrounds them. The beats stay identical in length regardless.
Listen: 歩く
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駅まで歩きます。
Eki made arukimasu.
I walk to the station.
Listen: 駅まで歩きます。
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駅まで歩きます pairs the verb with 駅 (e-ki), where the final i sits before the m of まで and keeps its voicing. In 歩きます the ki between the r and the m also stays voiced — so this particular sentence, unusually, leaves most of its high vowels intact. Compare it with 聞きます, where they don't survive.
"ah-ROO-koo" is the standard error: a stressed middle beat, an English r, and two rounded u's. Tap once instead of curling the tongue, spread the lips slightly for both u vowels, and let the final one drop out of voice entirely. If your word ends with a clear "koo," it's too heavy.