say it: AM-uh-chur-ish
amateurish is an adjective meaning "lacking professional skill or expertise". It carries one recorded sense.
lacking professional skill or expertise
“a very amateurish job”
“inexpert but conscientious efforts”
“an unskilled painting”
Definitions, synonyms and semantic relations for amateurish come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.