陸
リク, ロク, おか, くが, たち, みち, む, むつ
land, six
JLPT2 G4 S11 F736
坴 was originally 六 (mound that stretches at length) doubled → a stretch of land. 陸 is 坴# + 阜 piled earth → *land* winding far, wide and high → *plateau*; *winding*; *jump up*.
[Full Kanji Etymology List]