posthaste

Definition

Quickly, as fast as someone travelling post; with great speed.

Etymology

From the former instruction on letters ‘haste, post, haste’, later reinterpreted as a compound of post + haste.

Example Sentences

• "It is imperative that you finish your task posthaste."
• ""Sasi cannot last through the night." These words from his physician, and the spectacle of my friend, now reduced almost to a skeleton, sent me posthaste to Serampore."