Noun type: 48
Characteristics
Singular
| Nominative | aihe |
| Partitive | aihetta |
| Genetive | aiheen |
| Accusative | aiheen |
| Inessive | aiheessa |
| Elative | aiheesta |
| Illative | aiheeseen |
| Adessive | aiheella |
| Ablative | aiheelta |
| Allative | aiheelle |
| Essive | aiheena |
| Translative | aiheeksi |
| Abessive | aiheetta |
Plural
| Nominative | aiheet |
| Partitive | aiheita |
| Genetive | aiheiden; aiheitten |
| Accusative | aiheet |
| Inessive | aiheissa |
| Elative | aiheista |
| Illative | aiheisiin; aiheihin |
| Adessive | aiheilla |
| Ablative | aiheilta |
| Allative | aiheille |
| Essive | aiheina |
| Translative | aiheiksi |
| Abessive | aiheitta |
| Instructive | aihein |
| Comitative | aiheine |
Sample Sentences
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No, olen yrittänyt, mutta hän vaihtaa aihetta koko ajan. (Well I've tried but he/she changes the subject all the time.)
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Neuvostoliitto sai Mainilan laukauksista aiheen hyökätä Suomeen vuonna 1939. (The shelling of Mainila served as cause for the Soviet Union to attack Finland back in 1939.)
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Onko sinulla jotain aihetta epäilyyn? (Do you have a reason for suspicion?)
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[pysyvän] hampaan aihe (immature [permanent] tooth)
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silmun aihe (undeveloped bud)
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siemenaihe (ovule (structure that develops into a seed))
Etymology
Probably via metathesis from ajaa (“to drive, pursue”) + -e (*ajeh), "that which spurs or drives on" > "reason". May also be inspired by aie. Another theory proposes a borrowing from an earlier (Pre-Germanic) form of Proto-Germanic *aiz (“copper, bronze”) (like *ajes- → *aješ > *ajeh), but the semantics and distribution make this questionable.
Nouns inflected like aihe
aarre,
aate,
aave,
ahde,
ahne,
aidanne,
aie,
aihe,
aine,
ajankuluke,
ajanviete,
alanne,
alkeet,
aloite,
aloke,
altiste,
alue,
aluke,
amme,
ane, etc. (List truncated at 20 nouns)