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Sentence analysis
8Spans
Sentence
Span Details
口固め
verbal promise; pledge; forbidding someone from telling others; swearing to secrecynoun, suru verb
を
object markergrammar
して、
light/support verb with a noun or noun-like phrase-> するgrammar
必ず
always; without fail; certainlyadverb
戻る
return; go back; turn back; be returned; recover; come back; rebound; spring backgodan verb
と
quotation, conditional, companion, or and markergrammar
誓っ
swear; vow; pledge; take an oath-> 誓うgodan verb
た。
past tense or completed actiongrammar