unsuccessful
US /ˌʌn.səkˈses.fəl/
UK /ˌʌn.səkˈses.fəl/
1.
onsuccesvol, mislukt
not achieving the desired aim or result
:
•
Their attempts to reach an agreement were unsuccessful.
Hun pogingen om tot een akkoord te komen waren onsuccesvol.
•
The rescue mission was largely unsuccessful due to bad weather.
De reddingsmissie was grotendeels onsuccesvol vanwege slecht weer.