幕下 まくした しじゃありませんでした
makushita tsukedashija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 幕下付け出し

1. Was not a lower-ranked wrestler's offering.; Was not a gift from someone of lower rank.

Past/Perfective
Negative
Polite
Terminal Form
Sumo