私心|ししんshishin[0]heiban (flat)

1. nounselfishness; selfish motive

• Synonym利己主義りこしゅぎNeutralEgoism: the doctrine or attitude of pursuing your own interests; it names the whole -ism, not a momentary selfish thought like 「私心」.
• Synonym我欲がよくWrittenWritten word for greed that thinks only of oneself; close to 「私心」 but with a stronger emphasis on desire.
• RelatedわがままNeutralEveryday word for acting wilfully and thinking only of yourself; it stresses the behaviour, while 「私心」 is the self-serving thought or motive behind it.
• Related気ままきままNeutralDoing as you please, free and unrestrained; it can be a compliment or a criticism and does not necessarily imply selfishness.
• Related御都合主義ごつごうしゅぎNeutralOpportunism: acting only for your own convenience; it stresses shifting with circumstances to gain an advantage.
• RelatedオポチュニズムWrittenLoanword for opportunism; written in tone and seen mostly in political commentary.
• Related主我主義しゅがしゅぎWrittenWritten term for a self-centred creed; very rare, and 「利己主義」 is the usual way to say it.
• Related日和見主義ひよりみしゅぎNeutralOpportunism that sways with the wind; used mostly in politics, it stresses a wavering, fence-sitting stance.
• Antonym無私むしNeutralAntonym: selflessness, thinking of no personal gain, as in 「公平無私」; the direct opposite of 「私心」.

For everyday selfish or wilful behaviour, say 「わがまま」 or 「自分勝手」. In written prose, for thoughts tinged with personal self-interest, use 「私心」, as in 「私心を捨てる」; its opposite is 「無私」. The 「〜主義」 words name doctrines or political opportunism, not a momentary selfish thought.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 個人的こじんてきな考かんがえ。
2. 私欲しよくをはかる心こころ。