From 'grog' (diluted rum named after Admiral 'Old Grog' Vernon, who wore a grogram cloak) — originally meaning drunk on watered rum.
Dazed, weak, or unsteady, especially from illness, tiredness, or drink.
From 'grog,' the diluted rum served to British sailors, which was named after Admiral Edward Vernon, nicknamed 'Old Grog' because he wore a grogram cloak. Being 'groggy' meant being drunk on the Admiral's watered-down rum. Key roots: gros grain (French: "coarse grain (the fabric grogram)").
Being 'groggy' is named after a man's coat. Admiral Vernon ordered sailors' rum diluted with water in 1740. Sailors called the weakened drink 'grog' after his nickname 'Old Grog' — which he got from his grogram cloak (a coarse fabric, from French 'gros grain'). So: French fabric name → admiral's nickname → watered rum → being drunk → feeling dazed. Five