Meaning

verb discover or determine the existence, presence, or fact of

verb make mention of

verb observe with care or pay close attention to

originFrom Middle French observer, from Old French observer, from Latin observō (“to watch”), from ob- (“before”) + servō (“to keep”), from Proto-Indo-European *ser- (“to guard”). Cognate with Gothic 𐍃𐌰𐍂𐍅𐌰 (sarwa, “weapons, armour”), Old English searu (“device”).

Etymology from Wiktionary, CC BY-SA 3.0