Meaning of “unsuccessful” in the English Dictionary

"unsuccessful" in English

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uk /ˌʌn.səkˈses.fəl/ us /ˌʌn.səkˈses.fəl/

B2 not achieving the hoped for result; not successful:

They made several unsuccessful attempts to reach the men.
His application was unsuccessful.

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adverb uk /ˌʌn.səkˈses.fəl.i/ us /ˌʌn.səkˈses.fəl.i/

(Definition of “unsuccessful” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"unsuccessful" in American English

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us /ˌʌn·səkˈses·fəl/

not ending in success, or not achieving success:

After writing three unsuccessful plays, Miller finally had a hit.
adverb us /ˌʌn·səkˈses·fə·li/

Howard’s been unsuccessfully looking for an affordable apartment.

(Definition of “unsuccessful” from the Cambridge Academic Content Dictionary © Cambridge University Press)