Other forms: ripening, ripened, ripens
To ripen is to become ready to eat. Ripen on the windowsill, let it ripen, ripened in the sun.
Some fruit ripens after picking and some does not: bananas and avocados go on ripening, and strawberries and grapes simply rot. The gas that does it is ethylene, which is why a banana in a paper bag will ripen everything beside it.
1verbripenTo become ready to eat.
“Leave the tomatoes on a sunny windowsill to ripen.”
ripen is a maturing.
Old English ripian, from ripe, from a Germanic root meaning ready for harvest. Reap is a relative.
Old English
rīpian
Middle English
*ripenen
English, today
ripen
Built from
From Middle English ripenen, extended form of ripen, from Old English rīpian. In the modern form, equivalent to ripe + en. As in several other verbs, the alteration seems to have occurred during the time when the infinitive and plural ending -en was in the process of being lost (and was thus open to reinterpretation). The earliest attestation is deverbal ripening (“causing ripeness, ripening”).
Etymology from Wiktionary, CC BY-SA