はゴメンだ

no thanks

→ は
phrase Rare #20,658
no thanks An emphatic, informal way to reject or refuse something. It does not mean an apology here; the pattern Xはゴメンだ means “I want no part of X” or “count me out.”
JA: 危険な仕事はゴメンだ。
EN: No thanks, I want no part of dangerous work.

わが子埋めるはゴメンだ

I refuse to bury my own child.

— エリート・スクワッド (2007)

お前の共犯になるのはゴメンだ

No way am I becoming your accomplice.

— GHOST IN THE SHELL (1995)

おじいちゃんはゴメンだ

No way am I being called “Grandpa.”

— JUNO/ジュノ (2007)

はゴメンだ

Count me out.

— シティ・オブ・ゴッド (2002)