Words related to -en
mid-14c., shortenen, "make shorter;" late 14c., "grow shorter," from short (adj.) + -en (1); the earlier form of the verb was simply short, from Old English sceortian "to grow short, become short; run short, fail," gescyrtan "to make short." For cookery sense (1733) see shortening. Related: Shortened.
c. 1200, sikenen, "to become ill," from sick (adj.) + -en (1). Transitive sense of "to make sick, affect with illness" is recorded from 1610s. Related: Sickened; sickening. The earlier verb in Middle English was simply sick (Old English seocan) "be ill, fall ill." It is attested by 1825 as "affect with loathing or disgust."