Noun, Suru verb, Intransitive verbadventure; venture · venture which is unlikely to succeed; risky attempt; danger; hazard; risk

Na-adjective (keiyodoshi), Noundangerous; perilous; threatening; stormy; volatile; tense; critical; serious · stern (expression); hostile (attitude); sharp; harsh

I-adjective (keiyoushi)precipitous; rugged; inaccessible; impregnable; steep · grim; severe; stern

Nouninsurance · guarantee; warranty

Noun, Suru verb, Transitive verbexploration; expedition