What is the meaning of -et?

Used to form diminutives, loosely construed.

Forms active verbs into mediopassive verbs. Indicating 3rd person singular, indicative, present: it is; (it) -s; (it) is -ing/-n/-ed/-t

forms diminutives or endearing variants of nouns

forms diminutives or endearing variants of adjectives

Forms past participles of some verbs, like -t.

Forms the definite singular of most neuter nouns.

Forms adjectives from nouns with the sense of "like [noun]"; -esque.

Forms adjectives from nouns with the sense of "having [noun], being equipped with [noun]".

Alternative form of et

Alternative form of te

Forms diminutive nouns from nouns; in some words, it has lost its original meaning.

Used to form a diminutive, masculine noun.

Forms the definite singular of neuter nouns.

Forms the past tense and past participle of class-1 weak verbs.

alternative form of -ete

suffix forming nouns from verbs, adjectives, and other nouns

Used to form a diminutive, masculine noun.

Alternative form of (suffix used to form past participles of regular -er verbs)

suffix indicating diminution or affection

Added to a verb (or extremely rarely to a noun) to form a verb with a meaning of letting, making somebody do something or having something done to someone or something.

Added to a verb to form a noun, expressing the result of the action or sometimes a more abstract relation (compare -ás/-és).

Unrounded front-vowel variant of -t. See details there.

Combining form of -etik (passive-forming suffix) before all inflectional and derivational suffixes, except the dictionary form itself, the indefinite third-person singular present indicative

third-person singular present active subjunctive of

Forms momentane verbs.

Used with plant or tree names to form names of orchards, woods, forests, or groves.

Used to form nouns derived from the action of some verbs.

Suffix for definite form singular of neuter nouns, especially if they end with consonant or a stressed vowel.

Suffix for the neuter form of past participles of verbs belonging to the fourth declension (strong verbs). This may be analyzed as two morphemes: a combination of the suffix -en for past participle and -t for neuter, where the n of the first suffix disappears. Such an analysis is historically correct.

Used to indicate a consequential or concrete example

verb suffix for the second-person singular conditional

Source: wiktionary.org