Japanese · Pronunciation Guide
a-ke-ru, three even beats with a flat "keh" in the middle and a tap at the end.
akeru
The melody starts high on a and steps down, while all three slots stay the same size. This transitive verb pairs with the intransitive 開く (aku), which has only two beats; keeping the length difference clear is part of keeping the grammar clear.
Listen: 開ける
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窓を開けてください。
Mado o akete kudasai.
Please open the window.
Listen: 窓を開けてください。
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
窓を開けてください uses the te-form 開けて and stacks it before ください. That gives you a-ke-te-ku-da-sa-i — seven consecutive morae with no long vowels, no geminates and no nasals, which sounds simple but is exactly where English speakers accelerate. Hold the tempo steady to the final i.
"ah-KAY-roo" is the typical version: a stressed middle with an English diphthong, and a rounded rhotic ending. Level the beats, freeze the e, tap once, and unround the u. Because this verb and 開く differ mainly in length and ending, sloppy rhythm here can genuinely obscure which one you meant.