Morphologically appears to be a variant of tiukka, perhaps formed by analogy (with niuha ~ niukka), but the senses are closer to tiheä. SSA calls the word a possible "contamination" (i.e. irregular blend) of tiheä and tiukka.[1]
tiuha (comparative tiuhempi, superlative tiuhin)
| Inflection of tiuha (Kotus type 10/koira, no gradation) | |||
|---|---|---|---|
| nominative | tiuha | tiuhat | |
| genitive | tiuhan | tiuhien | |
| partitive | tiuhaa | tiuhia | |
| illative | tiuhaan | tiuhiin | |
| singular | plural | ||
| nominative | tiuha | tiuhat | |
| accusative | nom. | tiuha | tiuhat |
| gen. | tiuhan | ||
| genitive | tiuhan | tiuhien tiuhain rare | |
| partitive | tiuhaa | tiuhia | |
| inessive | tiuhassa | tiuhissa | |
| elative | tiuhasta | tiuhista | |
| illative | tiuhaan | tiuhiin | |
| adessive | tiuhalla | tiuhilla | |
| ablative | tiuhalta | tiuhilta | |
| allative | tiuhalle | tiuhille | |
| essive | tiuhana | tiuhina | |
| translative | tiuhaksi | tiuhiksi | |
| abessive | tiuhatta | tiuhitta | |
| instructive | — | tiuhin | |
| comitative | — | tiuhine | |