From Latin -iānus, which forms adjectives of belonging or origin from a noun.
-ian
|
-ian
By syncope from earlier *-ōjan, a northern Ingvaeonic innovated form of Proto-West Germanic *-ōn, from Proto-Germanic *-ōną.
-ian
| infinitive | -ian | -ienne |
|---|---|---|
| indicative mood | present tense | past tense |
| first person singular | -iġe | -ode |
| second person singular | -ast | -odest |
| third person singular | -aþ | -ode |
| plural | -iaþ | -odon |
| subjunctive | present tense | past tense |
| singular | -iġe | -ode |
| plural | -iġen | -oden |
| imperative | ||
| singular | -a | |
| plural | -iaþ | |
| participle | present | past |
| -iende | (ġe)-od | |
From Proto-Germanic *-ijaną.
-ian
| infinitive | -ian | |
|---|---|---|
| indicative | present | past |
| 1st person singular | -iu | -ida |
| 2nd person singular | -is | -ides |
| 3rd person singular | -id | -ida |
| plural | -iad | -idun |
| subjunctive | present | past |
| 1st person singular | -ie | -idi |
| 2nd person singular | -ies | -idis |
| 3rd person singular | -ie | -idi |
| plural | -ien | -idin |
| imperative | present | |
| singular | -i | |
| plural | -iad | |
| participle | present | past |
| -iandi | gi-id, -id | |
| infinitive | -ian | |
|---|---|---|
| indicative | present | past |
| 1st person singular | -iu | -da |
| 2nd person singular | -es | -des |
| 3rd person singular | -ed | -da |
| plural | -iad | -dun |
| subjunctive | present | past |
| 1st person singular | -ie | -di |
| 2nd person singular | -ies | -dis |
| 3rd person singular | -ie | -di |
| plural | -ien | -din |
| imperative | present | |
| singular | -e | |
| plural | -iad | |
| participle | present | past |
| -iandi | gi-d, -d | |
-ian
Words having this suffix can have an additional suffix -ism for an idea (e.g. kantianism) and an additional suffix -sk to form an adjective (e.g. kantiansk).
-ian