手のひら・掌・手の平|てのひらtenohira[1]atamadaka (head-high)

1. nounpalm (of the hand)
   彼かれの手てのひらに硬貨こうかを置おく。↗

   Place a coin in the palm of his hand.

• Synonym手の内てのうちNeutralAlso names the palm itself, but is mostly figurative, covering one's skill or the cards one holds, as in 「手の内を見せる」.
• Synonym平手ひらてNeutralAn open hand with the fingers spread, as in 「平手打ち」; it leans toward actions such as slapping rather than naming the palm as a body part.
• Synonym手掌しゅしょうWrittenWritten/formal prose: an anatomical term for the palm, used in medicine; everyday speech calls it 「手のひら」.
• Synonym手の腹てのはらCasualColloquial name for the palm, but examples are scarce; in daily use 「手のひら」 is the safe choice.
• Antonym甲こうNeutralRead 「よろい」 and means armor, so it is not really an antonym of the palm; the true opposite of 「手のひら」 is the back of the hand, 「手の甲」.

For the palm itself, use 「手のひら」, as in 「手のひらを返す」 for a sudden change of attitude. Use 「手の内」 for figurative hidden cards or skill, 「平手」 for slapping, and 「手の甲」 for the back of the hand.

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

1. （てのひら、たなごころ）手首てくびより先さき、手の物てのものを掴つかむときに物ものと接せっする面めん。