鼓膜 こまく張筋 ちょうきんでしょう
komakuchōkindeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 鼓膜張筋

1. Likely a tympanic membrane muscle contraction.; Possibly ear muscle tension.

Polite
Presumptive
Conjecture