keratinize

verb

ke·​ra·​ti·​nize

variants or British keratinise

ˈker-ət-ə-ˌnīz  kə-ˈrat-ᵊn-ˌīz 

keratinized or British keratinised; keratinizing or British keratinising

transitive verb

: to make keratinous

tissues keratinized by friction

intransitive verb

: to become keratinous or converted into keratin

a keratinizing scar