• 沈下ちんか — subsidence, sinking
• 沈着ちんちゃく — calmness, composure
• 沈没ちんぼつ — sinking (e.g., of a ship)
• 沈黙ちんもく — silence
• 沈しずむ — to sink; to feel down
• 沈しずめる — to submerge something

The kanji 沈 combines the water radical (氵) with the phonetic part 冘, suggesting the act of “going down into water.” It also conveys metaphorical sinking — such as in sadness or silence.