Verb (5-dan, む, intransitive)
1. to slip into; to crawl into (under); to conceal oneself (under)
一つの決意を胸に、私はベッドに潜り込む。With a single resolve in my heart, I slip into bed.
2. to sneak into; to infiltrate
仮面パーティーに潜り込んでたんだ。I'd snuck into a masquerade party.