unseamanlike

/ʌnˈsiːmənlaɪk/
adjective
  1. Not characteristic of or appropriate for a skilled sailor; lacking seamanship.
    • Leaving the ropes untied was an unseamanlike mistake.
    • His unseamanlike navigation nearly caused a collision.
    • The captain criticized the crew's unseamanlike behavior during the storm.
Antonyms
What does "unseamanlike" mean? | whatsthatwordmean | whatsthatwordmean