Nounresentment; grudge; malice; bitterness · matter for regret; regret

Na-adjective (keiyodoshi)extremely regrettable; deeply unfortunate; most disappointing; utterly deplorable

Expressions (phrases, clauses, etc.), I-adjective (keiyoushi)deeply regrettable

Godan verb with 'mu' ending, Transitive verbto regret

Adverb (fukushi)fully; to the full; (most) satisfactorily; amply; sufficiently; completely; perfectly