How to pronounce costly
Listen to costly in real sentences, spoken by real people, in the original YouTube videos. No dictionary recording — the word as it is actually used.
“costly” in real sentences
786 clips in the index · 282 American · 504 British. Clips come from parliamentary and government channels under open licences.
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costly maintenance delays.
GAO · watch from 0:44 · hear it here
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costly industrial action.
The Scottish Parliament · watch from 154:12 · hear it here
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potentially costly error.
FAA · watch from 1:54 · hear it here
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effective or less costly.
NIH · watch from 38:03 · hear it here
Why real speech
A dictionary gives you one careful reading of costly. Conversation gives you the stress, the vowel reduction and the speed that people actually use — and they differ between accents. YouTongue plays the surrounding sentence, so you hear the word in the rhythm it belongs to.