This kana represents the vowel sound 'i'. It is commonly used in adjectives to form the present tense (e.g., たかい, takai, 'high') and in verbs as part of the stem (e.g., たべる, taberu, 'to eat'). It can also serve as a grammatical particle to mark the subject in some contexts, though this is rare and often replaced by 『が』. For example: 『いま いそがしい い』 (ima isogashii i, 'I am busy now' – with 『い』 as an informal subject marker).