| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| English |
| English | unto | to, until | prep | IEW LRC |
| English | deflate | to lose/remove air | vb | AHD CDC LRC |
| English | de- | (do) opposite of | pfx | AHD W7 LRC |
| English | debase | to vitiate, reduce in state/quality | vb | AHD CDC LRC |
| English | decalescence | reduced temperature increase due to phase change | n | AHD LRC |
| English | decurrent | extending downward from place of insertion | adj | AHD CDC LRC |
| English | deglutinate | to unglue, loosen, separate | vb | AHD CDC LRC |
| English | dement | to make insane, destroy mind | vb | AHD CDC LRC |
| English | demersal | sinking in water; dwelling at/near bottom | adj | AHD CDC LRC |
| English | descend | to move to lower place | vb | AHD CDC LRC |
| English | detente | easing of tensions/relations | n | AHD LRC |
| English | deteriorate | to impair, make/become inferior in quality | vb | AHD W7 LRC |
| English | detumescence | diminution of swelling | n | AHD CDC LRC |
| English | taptoo | call sounded before taps: go to quarters | n | AHD W7 LRC |
| English | tattoo | call sounded before taps: go to quarters | n | AHD W7 LRC |
| English | to | (suggesting movement) toward person/place/thing | prep | AHD W7 LRC |
| English | too | also, besides | adv | AHD W7 LRC |
| Old English | tō | apart; (in)to; as, for; quite | adv | LRC |
| Middle English | de- | de- | pfx | W7 LRC |
| Middle English | to | (in)to, unto | prep | W7 LRC |
| Middle English | too | too | adv | W7 LRC |
| Celtic |
| Old Irish | di | from | prep | W7 LRC |
| West Germanic |
| Old Frisian | tō | to, at | prep | ASD LRC |
| Dutch | taptoe | taptoo | n | W7 LRC |
| Dutch | te | to | prep | TLL LRC |
| Dutch | tegen | against | prep | TLL LRC |
| Old Saxon | tō | to, at | prep | ASD LRC |
| Old High German | zuo | to, at | prep | W7 ASD LRC |
| German | zu | to, at | prep | LRC |
| North Germanic |
| Danish | toe | to, at | prep | ASD LRC |
| East Germanic |
| Gothic | du | in, to, towards, against | prep | LRC |
| Italic |
| Latin | dē, dē- | from, undo; about | prep | W7 LRC |
| Latin | dēterior | worse | adj | W7 LRC |
| Latin | dis- | not, undo | pfx | W7 LRC |
| Latin | donec | until, as long as | conj | W7 LRC |
| Latin | dum | while | conj | LRC |
| Latin | idem, eadem, idem | the same | dem.pron | LRC |
| Latin | inde | from that | adv | LRC |
| Latin | quidam, quaedam, quoddam | some, a certain | indef.pron | LRC |
| Latin | quidem | in fact, even | adv | LRC |
| Latin | quoniam | since | conj | LRC |
| Late Latin | dēteriorō, dēteriorāre, dēteriorāvī, dēteriorātus | to make worse, to decay | vb | W7 LRC |
| Portuguese | de | of, by, from | prep | TLL LRC |
| Spanish | de | of, by, from | prep | TLL LRC |
| Old French | de- | undo | pfx | W7 LRC |
| Old French | des- | undo | pfx | W7 LRC |
| Middle French | des- | not, undo | pfx | W7 LRC |
| French | de | of, from, about | prep | TLL LRC |
| Italian | da | by, from | prep | TLL LRC |
| Italian | di | of, about | prep | TLL LRC |
| Balto-Slavic |
| Lithuanian | kad, kadà | when | adv | LRC |
| Old Church Slavonic | da | in order to, that; may, let; and, then | conj | LRC |
| Old Church Slavonic | do | (up) to; (with numerals) about | prep | LRC |
| Hellenic |
| Greek | δέ | and, on the other hand; indeed | pcl | LRC |