AFFIX, in Grammar, a particle added at the close of a word, either to diversify its form or alter its signification. We meet with affixes in the Saxon, the German, and other northern languages; but more especially in the Hebrew, and other oriental tongues. The Hebrew affixes are single syllables, frequently single letters, subjoined to nouns and verbs; and contribute not a little to the brevity of that language. The oriental languages are much the same as to the radicals, and differ chiefly from each other as to affixes and prefixes.