坂
さか · saka · JLPT N4 · noun
slope
⛰️ 坂 = earth 土 + turn back 反: ground that tilts back against you
The left part 土 means earth; the right part 反 means to oppose or turn back and also hints at the sound. A slope is earth that pushes back as you climb. Sound hook: saka sounds like sack, as in hauling a sack up a hill.