unfruitful (a) (effort) | infructueux (a) (effort) |
unfruitful (a) (attempt) | manqué (a) (attempt) |
unfruitful (a) (attempt) | inefficace (a) (attempt) |
unfruitful (a) (attempt) | raté (m) (a) (attempt) |
unfruitful (a) (attempt) | infructueux (a) (attempt) |