From Proto-Finnic *tahko, from Proto-Finno-Permic . Cognate to Finnish tahko, Votic tahko (“wood block”), Udmurt тӥш (tiš, “axe eye, backside of a blade”), and Komi-Zyrian тыш (tyš, “axe eye”). The meaning of "hone" seen in the Finnic family is possibly originally from a compound word - *tahkokivi, as seen in Votic tahkotšivi (“hone”).
tahk (genitive tahu, partitive tahku)
| Declension of tahk (ÕS type 22e/riik, k-ø gradation) | |||
|---|---|---|---|
| singular | plural | ||
| nominative | tahk | tahud | |
| accusative | nom. | ||
| gen. | tahu | ||
| genitive | tahkude | ||
| partitive | tahku | tahke tahkusid | |
| illative | tahku tahusse |
tahkudesse tahesse | |
| inessive | tahus | tahkudes tahes | |
| elative | tahust | tahkudest tahest | |
| allative | tahule | tahkudele tahele | |
| adessive | tahul | tahkudel tahel | |
| ablative | tahult | tahkudelt tahelt | |
| translative | tahuks | tahkudeks taheks | |
| terminative | tahuni | tahkudeni | |
| essive | tahuna | tahkudena | |
| abessive | tahuta | tahkudeta | |
| comitative | tahuga | tahkudega | |
From Proto-Finnic *tahko. Related to Finnish tahko.
tahk
| Inflection of tahk (inflection type 1/ilo) | |||
|---|---|---|---|
| nominative sing. | tahk | ||
| genitive sing. | tahkon | ||
| partitive sing. | tahkod | ||
| partitive plur. | tahkoid | ||
| singular | plural | ||
| nominative | tahk | tahkod | |
| accusative | tahkon | tahkod | |
| genitive | tahkon | tahkoiden | |
| partitive | tahkod | tahkoid | |
| essive-instructive | tahkon | tahkoin | |
| translative | tahkoks | tahkoikš | |
| inessive | tahkos | tahkoiš | |
| elative | tahkospäi | tahkoišpäi | |
| illative | tahkoho | tahkoihe | |
| adessive | tahkol | tahkoil | |
| ablative | tahkolpäi | tahkoilpäi | |
| allative | tahkole | tahkoile | |
| abessive | tahkota | tahkoita | |
| comitative | tahkonke | tahkoidenke | |
| prolative | tahkodme | tahkoidme | |
| approximative I | tahkonno | tahkoidenno | |
| approximative II | tahkonnoks | tahkoidennoks | |
| egressive | tahkonnopäi | tahkoidennopäi | |
| terminative I | tahkohosai | tahkoihesai | |
| terminative II | tahkolesai | tahkoilesai | |
| terminative III | tahkossai | — | |
| additive I | tahkohopäi | tahkoihepäi | |
| additive II | tahkolepäi | tahkoilepäi | |