ねむけざまし
keeping oneself awake; fighting off drowsiness; method for keeping oneself awake
Also written 眠気ざまし、眠け覚まし、眠気覚し、眠け覚し
Noun
私わたしは眠気覚ねむけざましに紅茶こうちゃを飲のんだ。
I had a cup of tea to keep myself awake.
眠気覚ねむけざましにコーヒー飲のんで、外そとの風かぜに当あたってくるよ。
To keep myself awake I drink coffee and expose myself to the wind.