noun which may take the genitive case particle 'no', noun
Literary word describing immense vigor, force, or momentum, often in a dramatic or poetic context. Commonly modifies nouns like 勢い (momentum) or 気迫 (spirit).
His speech had tremendous momentum.
From Chinese 滔天 (tāotiān), literally 'surging to the heavens', used figuratively for overwhelming force. The exact path into Japanese is uncertain, but it is a Sino-Japanese borrowing.