pen, v. [confine], [coop], encage, corral.
pen, n. [coop], [sty], cote, enclosure, hutch, paddock, [pound], pinfold, corral, stockade.
penalty, n. [punishment], [retribution]; forfeiture, [fine], [mulct].
pending, a. [undecided], [unsettled].--prep. during.
penetrable, a. [permeable], [pervious]. Antonym: [impenetrable].
penetrate, v. [pierce], [perforate]; [comprehend], [understand]; explore; interpenetrate.
penetrating, a. [piercing], [subtile], penetrant, [sharp]; acute, [discerning], penetrative.
penetration, n. [piercing], [perforation]; acuteness, [discernment], [sharpness]; interpenetration.
peninsula, n. chersonese.
penis, n. Associated words: penial, [foreskin], prepuce, glans, urethra, chordee, [erection], orgasm, corpus spangiosum, priapism, phimosis, smegma, phallus, bougie.