In the traditional form, the Hebrew alphabet is an abjad consisting only of consonants, written from right to left.
When used to write Yiddish, vowels are indicated, using certain letters, either with or without niqqud-diacritics (e.g., respectively: "אָ", "יִ" or "י", "ע"), except for Hebrew words, which in Yiddish are written in their Hebrew spelling.