expression, godan verb (-su)
spend all one's free time; while away the hours
Implies having abundant leisure time and using it freely, often without a specific purpose. The phrase can carry a nuance of idleness or indulging in something at length.
日曜日は暇にあかして小説を読んでいた。
On Sunday I spent all my free time reading a novel.
彼は暇にあかしてゲームばかりし
He spends all his free time doing nothing but playing games.