1. showing a lack of skill or experience; not done with professional competence

Examples

• The play suffered from amateurish acting and poor lighting.
• His amateurish attempt at plumbing flooded the basement.
• The website looked amateurish with its poor design and typos.
• Despite her enthusiasm, her painting technique was still amateurish.
• The documentary was criticized for its amateurish camera work.
• The band’s amateurish performance disappointed the audience.