• 白しろ — white (noun)
• 白しろい — white (adjective)
• 告白こくはく — confession
• 明白めいはく — clear; obvious
• 白紙はくし — blank paper; figuratively, a clean slate
• 白夜びゃくや — white night (midnight sun)

Originally a pictograph of a head/skull, “白” came to mean “pure” or “white.” It’s central in describing color, seasons (e.g. 白夜), and honesty. In Japanese, it’s also used metaphorically for innocence, clarity, or truth-telling.