Meaning of めぐすり in Japanese

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Definition of めぐすり

めぐすり(megusuri) 【目薬】

はやめぐすり(hayamegusuri) 【早め薬】

にかいからめぐすり(nikaikaramegusuri) 【二階から目薬】

(exp) something that cannot be done no matter how hard one tries (and is slightly frustrating because of this)

きやすめぐすり(kiyasumegusuri) 【気休め薬】

めぐすりをさす(megusuriwosasu) 【目薬を差す ·目薬を点す ·目薬を注す】

(exp, v5s) to apply eyedrops
一生懸命指でまぶたを広げて目薬を差しました。
With great effort I held his eyelids open with my fingers and dropped in the eye medicine.