mellett + -i. It is an adjective formed from a postposition, so that it can be used attributively to mark the qualifier of a noun (preceding it), rather than marking the modifier of a verb (or verb derivative), like an adverbial.
melletti (not comparable)
| Inflection (stem in -e-, front unrounded harmony) | ||
|---|---|---|
| singular | plural | |
| nominative | melletti | mellettiek |
| accusative | mellettit | mellettieket |
| dative | mellettinek | mellettieknek |
| instrumental | mellettivel | mellettiekkel |
| causal-final | mellettiért | mellettiekért |
| translative | mellettivé | mellettiekké |
| terminative | mellettiig | mellettiekig |
| essive-formal | mellettiként | mellettiekként |
| essive-modal | — | — |
| inessive | mellettiben | mellettiekben |
| superessive | mellettin | mellettieken |
| adessive | mellettinél | mellettieknél |
| illative | mellettibe | mellettiekbe |
| sublative | mellettire | mellettiekre |
| allative | mellettihez | mellettiekhez |
| elative | mellettiből | mellettiekből |
| delative | mellettiről | mellettiekről |
| ablative | mellettitől | mellettiektől |
| non-attributive possessive - singular |
mellettié | mellettieké |
| non-attributive possessive - plural |
mellettiéi | mellettiekéi |