How do you pronounce "costlier"?

In American English: /ˈkɔstliːɝ/ (KAWSTL-ee-ur). In British English: /kˈɒstliə/ (K-ostl-ee). In Canadian English: /ˈkɔstliːɝ/ (KAWSTL-ee-ur). In Australian English: /kˈɒstliə/ (K-ostl-ee).

Is "costlier" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˈkɔstliːɝ/ (KAWSTL-ee-ur), while in British English it's /kˈɒstliə/ (K-ostl-ee).

How to Pronounce "costlier"

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costlier

regional

/ˈkɔstliːɝ/

KAWSTL-ee-ur

Syllable Breakdown

kɔstlcos·iːtli·ɝer

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14