self-built

Adjective

not-comparable

built by oneself, often from commercially available components

Japanese Meaning

自分で組み立てた（市販部品などを利用して自ら構築した） / 自作の

The young engineer proudly displayed his self-built robot at the science fair.

若い技術者は科学展で自作のロボットを誇らしげに展示した。

Sense（1）

built by oneself, often from commercially available components

a self-built car