• 候補こうほ — candidate
• 天候てんこう — weather
• 気候きこう — climate
• 時候じこう — season; seasonal climate
• 候文そうろうぶん — classical Japanese epistolary style
• 居候いそうろう — dependent boarder; lodger

候 combines the person radical 亻 with the phonetic 侯. It originally suggested “to wait/watch,” later extending to polite inquiry about someone’s condition and to weather/season senses. It’s common in classical expressions and formal writing.