崩壊 collapse; caving in
お手並み拝見  let's see what you've got; show me what you've got
心拍数  one's heart rate; pulse rate
嗅ぐ to sniff; to smell
抜粋  extract; excerpt
先延ばしにする  to delay; to put off
複数  multiple; several
泊 counter for nights of a stay
里帰り returning home; visiting one's parents
夜更かし  staying up late
腕を振るう  to exercise one's talent; to display one's ability​
宅配 home delivery
ドタキャン  last-minute cancellation
範囲内  in range; within range
壁ドン  slamming one's hand into the wall in front of somebody (e.g. to stop them from leaving; often viewed as romantic)
戸締まり closing up; fastening the doors