Amateurish, unprofessional, unpolished, juvenile.
Of inferior quality.
A professional sports association at the lower levels of minor league organization.
A low-ranking or inferior level among groups, professions, organizations, etc.
Negligent or imperfect.
Not keeping good faith; disloyal; not faithful.
Not honest or upright.
Not faithfully rendering the meaning of the source language; incorrect.
Not having religious faith.
Adulterous.