| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| Celtic |
| Old Irish | temel | darkness | n | RPN LRC |
| English |
| Middle English | temeryte | temerity | n | W7 LRC |
| English | temerarious | brash, marked by temerity | adj | AHD W7 LRC |
| English | temerity | rashness, recklessness, foolhardy/unreasonable contempt for danger/opposition | n | AHD W7 LRC |
| English | Tenebrae | celebration re: last 3 days of Christian Holy Week | prop.n | LRC |
| English | tenebrionid | darkling beetle | n | AHD LRC |
| West Germanic |
| Old Saxon | þimm | dark | n | RPN LRC |
| Low German | dumper | gloomy | adj | RPN LRC |
| Old High German | demar | darkness | n | W7 LRC |
| Middle High German | dunster | dark(ness) | n | RPN LRC |
| German | düster | dark, gloomy; sad, dismal | adj | LRC |
| Italic |
| Latin | temerarius | fearless, adventurous | adj | W7 LRC |
| Latin | temere | randomly | adv | W7 LRC |
| Latin | temeritas | temerity | n.fem | W7 LRC |
| Latin | tenebrae | darkness | n.fem.pl | RPN LRC |
| Latin | tenebriō | one who avoids light | n | AHD LRC |
| Latin | tenebrōsus | dark, gloomy | adj | CLD LRC |
| Medieval Latin | Tenebrae | Tenebrae, darkness | prop.n.fem.pl | W7 LRC |
| Balto-Slavic |
| Lithuanian | tamsà | darkness | n.fem | LRC |
| Lithuanian | tamsùs, tamsì | dark | adj | LRC |
| Latvian | tumsa | darkness | n | RPN LRC |
| Old Church Slavonic | tьma | darkness | n | RPN LRC |
| Indo-Iranian |
| Avestan | təmah- | darkness | n | RPN LRC |
| Sanskrit | támas- | gloom, darkness | n | RPN LRC |
| Sanskrit | tamas | temerity | n | W7 LRC |
| Sanskrit | támisrā | dark night | n | RPN LRC |