借 is built from the 亻 (person (left)) and 昔 components.
It reads シャク like 昔, as do 錯 — learn 昔 once and the family's reading comes with it.
A common word using 借 is 借りる (かりる), meaning “to borrow, to owe”.
Kanji that look similar include 修, 俳, 俵, and 俸.