Perhaps from English sclither, dialectal variant of slither.
sglefrio (first-person singular present sglefriaf, not mutable)
| singular | plural | impersonal | ||||||
|---|---|---|---|---|---|---|---|---|
| first | second | third | first | second | third | |||
| present indicative/future | sglefriaf | sglefri | sglefri, sglefria | sglefriwn | sglefriwch | sglefriant | sglefrir | |
| imperfect (indicative/subjunctive)/conditional | sglefriwn | sglefrit | sglefriai | sglefriem | sglefriech | sglefrient | sglefrid | |
| preterite | sglefriais | sglefriaist | sglefriodd | sglefriasom | sglefriasoch | sglefriasant | sglefriwyd | |
| pluperfect | sglefriaswn | sglefriasit | sglefriasai | sglefriasem | sglefriasech | sglefriasent | sglefriasid, sglefriesid | |
| present subjunctive | sglefriwyf | sglefriech | sglefrio | sglefriom | sglefrioch | sglefriont | sglefrier | |
| imperative | — | sglefri, sglefria | sglefried | sglefriwn | sglefriwch | sglefrient | sglefrier | |
| verbal noun | sglefrio | |||||||
| verbal adjectives | sglefriedig sglefriadwy | |||||||
| Inflected colloquial forms | singular | plural | ||||
|---|---|---|---|---|---|---|
| first | second | third | first | second | third | |
| future | sglefria i, sglefriaf i | sglefri di | sglefrith o/e/hi, sglefriff e/hi | sglefriwn ni | sglefriwch chi | sglefrian nhw |
| conditional | sglefriwn i, sglefriswn i | sglefriet ti, sglefriset ti | sglefriai fo/fe/hi, sglefrisai fo/fe/hi | sglefrien ni, sglefrisen ni | sglefriech chi, sglefrisech chi | sglefrien nhw, sglefrisen nhw |
| preterite | sglefriais i, sglefries i | sglefriaist ti, sglefriest ti | sglefriodd o/e/hi | sglefrion ni | sglefrioch chi | sglefrion nhw |
| imperative | — | sglefria | — | — | sglefriwch | — |
| Note: All other forms are periphrastic, as usual in colloquial Welsh. | ||||||