to harden, to stiffen, to toughen; to become severe; (penis) to become erect

listen to the pronunciation of to harden, to stiffen, to toughen; to become severe; (penis) to become erect
İngilizce - Türkçe
sertleşmek
to harden, to stiffen, to toughen; to become severe; (penis) to become erect