noun, noun or participle which takes 'suru', transitive verb
urgent dispatch; express sending
Used for sending something quickly or by express delivery. Often appears in business or logistics contexts.
書類を急送してください。
Please send the documents by express delivery.
急送便で荷物が届いた。
The package arrived by express delivery.
Compound of 急 (urgent) and 送 (send). The exact historical derivation is uncertain, but the meaning is transparent from its components.