posthaste C2+ Topic:Describing Qualities US /ˌpoʊstˈheɪst/ UK /ˌpəʊstˈheɪst/ See IPA manual Meanings 1 adv with all possible speed; very quickly The messenger rode posthaste to deliver the urgent dispatch. Thesaurus Synonyms 1 adv · with all possible speed;... quicklyspeedilyrapidlyswiftlyhastilypromptly ↔ Opposites slowlyleisurely Word family Related forms posthastehasty Etymology AI details From the phrase 'post haste,' originally an instruction on letters meaning 'with speed of the post,' combining post ('mail courier') and haste. posta Italian haste Old French View etymology graph -> Topics Describing Qualities External links Google Images Cambridge Dictionary Wiktionary # posthaste **Type:** Word **Level:** C2+ **Part of speech:** adv **IPA (US):** /ˌpoʊstˈheɪst/ **IPA (UK):** /ˌpəʊstˈheɪst/ ## Meanings 1. with all possible speed; very quickly ## Examples - The messenger rode posthaste to deliver the urgent dispatch. ## Synonyms - quickly - speedily - rapidly - swiftly - hastily - promptly ## Antonyms - slowly - leisurely ## Related Forms - post - haste - hasty ## Roots and Affixes - Root: posta - Root: haste ## Etymology From the phrase 'post haste,' originally an instruction on letters meaning 'with speed of the post,' combining post ('mail courier') and haste. ## AI Etymology Posthaste is from the phrase 'post haste,' originally an instruction on letters meaning 'with speed of the post,' combining post ('mail courier') and haste. Important recorded forms include posta (Italian) and haste (Old French). The modern sense follows that older lexical line closely. In current use it covers with all possible speed; very quickly. The wider family includes related words such as post, haste, and hasty. ## Topics - Describing Qualities markdown