þat

• that

From Old English þæt.

þat

1. that
   • a1420, The British Museum Additional MS, 12,056, “Wounds complicated by the Dislocation of a Bone”, in Robert von Fleischhacker, editor, Lanfranc's "Science of cirurgie."‎, London: K. Paul, Trench, Trübner & Co, translation of original by Lanfranc of Milan, published 1894, →ISBN, page 63:

     Ne take noon hede to brynge togidere þe parties of þe boon þat is to-broken or dislocate, til viij. daies ben goon in þe wyntir, & v. in þe somer; for þanne it schal make quytture, and be sikir from swellynge; & þanne brynge togidere þe brynkis eiþer þe disiuncture after þe techynge þat schal be seid in þe chapitle of algebra.

     (please add an English translation of this quote)

From Proto-Germanic *þat (neuter of *sa (“that”)), from Proto-Indo-European *tód (neuter of *só (“that”)). Cognate with Old English þæt, Old Saxon that, Old High German daz, Gothic 𐌸𐌰𐍄𐌰 (þata).

þat

1. it (third-person nominative and accusative singular neuter personal pronoun)

   • Þat var einn dag, er konungr talaði við Tóka ok spurði, hversu gamall maðr Tóki væri.

     It was one day, that the king spoke with Took and asked, how old (of a man) Took was.

2. that (nominative and accusative singular neuter demonstrative pronoun)