English word plein comes from Proto-Indo-European *pl̥-, Middle English full, Proto-Indo-European *pl(e)Hk-, Proto-Indo-European - -nós, Proto-Indo-European *pelh, Italian plain, and later Latin planus (Level, flat, even.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *pl̥- | Proto-Indo-European (ine) | |
| full | Middle English (enm) | |
| *pl(e)Hk- | Proto-Indo-European (ine) | |
| - -nós | Proto-Indo-European (ine) | |
| *pelh | Proto-Indo-European (ine) | |
| plain | Italian (it) | |
| full | English (en) | (archaic) Quite; thoroughly; completely; exactly; entirely. (transitive) To baptise. (of the moon) To become full or wholly illuminated. (AU) Drunk, intoxicated. (informal) Having eaten to satisfaction, having a "full" stomach; replete.. (obsolete) Having the mind filled with ideas; stocked with knowledge; stored with information.. (obsolete) Impregnated; made pregnant.. (poker, postnominal) [...] |
| planus | Latin (lat) | Level, flat, even. |
| *pl̥h₁nós | Proto-Indo-European (ine) | Full. |
| *plēnos | Proto-Italic (itc-pro) | Full. |
| plenus | Latin (lat) | (with genitive, or ablative in later Latin) full (of), filled, plump. Satisfied. |
| plein | Old French (fro) | Full (at capacity with respect to space). |
| plein | English (en) |