Back-formation from esküszik. Created during the Hungarian language reform, which took place in the 18th–19th centuries.
eskü (plural eskük)
| Inflection (stem in long/high vowel, front rounded harmony) | ||
|---|---|---|
| singular | plural | |
| nominative | eskü | eskük |
| accusative | esküt | esküket |
| dative | eskünek | esküknek |
| instrumental | esküvel | eskükkel |
| causal-final | esküért | eskükért |
| translative | esküvé | eskükké |
| terminative | esküig | eskükig |
| essive-formal | esküként | eskükként |
| essive-modal | — | — |
| inessive | esküben | eskükben |
| superessive | eskün | eskükön |
| adessive | eskünél | esküknél |
| illative | eskübe | eskükbe |
| sublative | esküre | eskükre |
| allative | eskühöz | eskükhöz |
| elative | esküből | eskükből |
| delative | esküről | eskükről |
| ablative | eskütől | esküktől |
| non-attributive possessive - singular |
esküé | esküké |
| non-attributive possessive - plural |
esküéi | eskükéi |
| Possessive forms of eskü | ||
|---|---|---|
| possessor | single possession | multiple possessions |
| 1st person sing. | esküm | esküim |
| 2nd person sing. | esküd | esküid |
| 3rd person sing. | esküje | esküi |
| 1st person plural | eskünk | esküink |
| 2nd person plural | eskütök | esküitek |
| 3rd person plural | esküjük | esküik |