平凡 へいぼん陳腐 ちんぷでしょう
heibon chimpudeshō

Noun
Desu Copula
na-Adjective

Expresses probability in a polite manner ("probably…") of 平凡陳腐

1. Ordinary; Commonplace; Trite; Banal

Polite
Presumptive
Conjecture