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.
Of or pertaining to, or creating a word form expressing smallness, youth, unimportance, or endearment.
Very small.
A word form expressing smallness, youth, unimportance, or endearment. For example, doggie from dog, Sophie for Sophia, darling from dear