才気|さいきsaiki[1]atamadaka (head-high)

1. nounwisdom
   彼かれはハンサムで才気さいきも金かねもある紳士しんしである。↗

   He is a gentleman, handsome, clever, and rich.

• Synonym機知きちWrittenWritten/formal prose word for wit that adapts quickly to the moment, as in 「機知に富む」. It highlights resourceful cleverness rather than 「才気」's outward brilliance.
• SynonymエスプリCasualColloquial loanword (from French) for wit and playful cleverness. It stresses French-style sparkle and humour rather than 「才気」's flashing brilliance.
• Synonym才覚さいかくWrittenWritten/formal prose word for resourcefulness — handling things cleverly, or finding a way to raise money. Practical ingenuity rather than 「才気」's brilliance.
• Synonym英才えいさいWrittenWritten/formal prose word for outstanding talent or a gifted person. It praises exceptional promise; 「才気」 points to the quick brilliance of the mind.
• Synonym才さいNeutralCareful: this is the counter for years of age, also written 「才」. Despite the shared kanji, it has nothing to do with 「才気」's sense of brilliance.
• Synonym才知さいちNeutralNeutral word combining talent and wisdom. It states the ability plainly, without the sharp, outward brilliance 「才気」 suggests.
• Related知恵ちえNeutralEveryday word for wisdom — the judgment to work things out, as in 「知恵を絞る」. Neutral in tone and far more common than 「才気」, without its sharp, showy brilliance.
• Related英知えいちWrittenWritten/formal prose word for deep, lofty wisdom, as in 「人類の英知」. Weightier and more profound than 「才気」, which suggests quick, flashing brilliance.
• Related知性ちせいNeutralNeutral word for the rational ability to understand and judge, with a feel of cultured intellect. It names the faculty itself, not 「才気」's flashing brilliance.
• Related知力ちりょくNeutralNeutral word for mental capacity as a measurable level — how strong someone's head is, judged objectively. 「才気」 praises the brilliance itself.
• Related知能ちのうNeutralNeutral word for the ability to understand and judge, as in 「知能指数」. It measures mental ability; 「才気」 is the striking brilliance of it.
• Related聡明そうめいWrittenWritten/formal prose word for being quick to understand and sensible; often used in praise. It evaluates the person, while 「才気」 names the brilliance itself.
• Related利口りこうCasualColloquial word for being clever and sharp, and also for children or pets being well-behaved and obedient. Warmer and more everyday than 「才気」.
• RelatedウイットCasualColloquial loanword for wit — the humour and clever turns produced by a sharp mind in talk or writing. It lives in conversation; 「才気」 is broader brilliance.
• Related天才てんさいNeutralNeutral word for extraordinary inborn ability, or the person who has it. It names exceptional talent itself; 「才気」 describes its sharp, outward show.
• Related才力さいりょくWrittenWritten/formal prose word, now rare, for natural-born ability or talent. It points to raw talent rather than 「才気」's quick, flashing intelligence.
• RelatedとんちCasualColloquial word for a flash of quick wit — cleverness that springs up on the spot. A one-off spark of ingenuity, not 「才気」's overall brilliance.
• Antonym無能むのうNeutralAntonym: neutral word for lacking ability or competence — uselessness, or an incompetent person. The direct opposite of 「才気」's keen intelligence.
• Antonym愚鈍ぐどんWrittenAntonym: written/formal prose word for being stupid and slow-witted. It sits at the opposite pole from 「才気」's sharp, outward brilliance.

Use 「才気」 for sharp, outward-flashing brilliance of mind, often as 「才気煥発」 or 「才気あふれる」. For everyday wisdom choose 「知恵」; for quick, adaptable wit 「機知」; for deep, lofty wisdom 「英知」. 「知性」「知能」「知力」 name intellect as a faculty or measurable level; 「天才」「英才」 praise exceptional talent; 「聡明」「利口」 describe clever people; 「ウイット」「エスプリ」「頓知」 cover wit and on-the-spot cleverness; 「才覚」 is practical resourcefulness. 「愚鈍」 and 「無能」 are opposites, and 「才」 is only the age counter.

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

1. 才知さいちの優すぐれた働はたらき。