You can't focus on studying if you're chatting with someone else, too. So the cell phone is off limits. Turn off the home phone, too, along with the computer (unless you're prepping on it) and any music with vocals. Study music should be lyric-free! Post a sign on your door for people to stay away.
cuirass (plural cuirasses) 1  A piece of defensive armor, covering the body from the neck to the girdle. 2  The breastplate taken by itself.
Definition of cusp. : point, apex: such asa : a point of transition (as from one historical period to the next) : turning point; also : edge, verge on the cusp of stardom â¦ you're on the cusp between heat exhaustion and life-threatening heatstroke. cuspate.