thee

From Middle English þe, from Old English þē (“thee”, originally dative, but later also accusative, supplanting accusative þec), from Proto-Germanic *þiz (“thee”), from Proto-Indo-European *te (“second-person singular pronoun”). Cognate with Saterland Frisian die (“thee”), West Frisian dy (“thee”), German Low German di (“thee”), German dir (“thee”, dative pron.), Icelandic þér (“thee”). More at thou.

From Middle English theen (“to increase, prosper, flourish”), from Old English þēon (“to thrive, prosper, flourish, grow”), from Proto-Germanic *þinhaną (“to thrive, succeed”), from Proto-Indo-European *tenk- (“to succeed, turn out well”). Cognate with Dutch gedijen (“to flourish, thrive, prosper, succeed”), German gedeihen (“to thrive”), Gothic 𐌲𐌰𐌸𐌴𐌹𐌷𐌰𐌽 (gaþeihan, “to increase, thrive”).

From Pitman zee, which it is related to phonetically and graphically, and the sound it represents.

Respelling of the popularized by Thee Temple ov Psychick Youth.