flushing
Word family
Synonym discussion
Sense: verb/1
'Flush', 'blush', and 'redden' all describe the face becoming red, but they differ in cause and formality. 'Blush' is specifically for embarrassment or shyness — you blush when someone pays you a compliment. 'Flush' covers a wider range of triggers: heat, exercise, alcohol, and strong emotion. 'Redden' is more neutral and slightly more formal; it can describe any reddening of skin from any cause. In everyday conversation, 'flush' and 'blush' are the most natural choices. For example: 'She blushed when he complimented her dress' (embarrassment only), but 'His face flushed after running for the bus' (exercise, not embarrassment).
Common collocations
Etymology
The verb 'flush' meaning 'become red' likely comes from the Middle English 'fluschen' (to fly up suddenly), influenced by the idea of blood rushing to the face. The toilet and cleaning senses developed later in the 1800s from the general meaning 'to flow out suddenly' — which itself comes from the same root as 'flux' (Latin 'fluxus', meaning flow). The place name Flushing comes from the Dutch town Vlissingen, which English speakers adapted to Flushing.