Classical compass winds ("ζέφυρος") from the west – were added soon enough. The etymology of the names of the four archaic Greek winds is uncertain. Among tentative propositions is that "Boreas" might come from "boros", an old variant of "oros" (Greek for "mountains", which were to the north geographically). An alternative hypothesis is that it may come from "boros" meaning "voracious". Another is that it comes from the phrase "ἀπὸ τῆς βοῆς" ("from the roar"), a reference to its violent and loud noise. "Notos" probably comes from "notios" ("moist", a reference to the warm rains and storms brought from the south). "Eurus" and
HMS Boreas (1757) of action." Further, the sides of the vessel above the level of the deck were too low, leaving the crew exposed to enemy fire should "Boreas" run alongside an opposing ship. Boyle's concerns went unheeded, and "Boreas" was put to sea in early 1758. In April she assisted in the capture of the 36-gun French frigate "Diane". Boyle then sailed her to America on 21 June 1758 and she was subsequently involved in the operations off Louisbourg that year. "Boreas" shared in the proceeds of the capture of the merchantman "Foudroyant" and the schooner "Two Brothers", captured off Louisbourg. She