Lowercase Characters, Lowercase
Noun
こもじ
どうやって小文字と大文字を切りかえますか。
How do you switch from lowercase to uppercase?
パスワードには、かならず大文字、小文字、すう字を一つい上つかってください。
Passwords must contain at least one uppercase letter, one lowercase letter and a number.
君のEメールアドレスって、全部小文字なの？本当に？ちょっとおかしいんじゃないの？
Is your email address in all lowercase letters? Is it really? Are you crazy?
You know that 文字 means "letters". So, what are "small letters"? That would be lowercase letters.
The reading for 小 is an exceptional reading. You know it means "small," so think about what else is small: a child. How do you say "child" in Japanese? こ. You also know how to say the 文字 portion from the previous level, so combine those together and you have こもじ.