意志|いしishi[1]atamadaka (head-high)

1. nounwill; volition; intention; intent; determination
   意志いしに反はんして何なんかを無理むりにさせる事ことはできない。↗

   No one can force you to do anything against your will.

• Synonym意思いしNeutralOne's thoughts or intentions, as in 「意思表示」 and 「意思疎通」; 「意志」 emphasizes the willpower to carry something through.
• Synonym意力いりょくWrittenWritten/formal for the willpower to persist to the end; rare in modern usage. In everyday speech say 「意志力」 or 「精神力」.
• Related意地いじNeutralStubbornness or pride in seeing things through, as in 「意地を張る」; often implies obstinacy, while 「意志」 is neutral determination.
• Related決断けつだんNeutralMaking a firm, decisive choice, as in 「決断を下す」; a single act of deciding. 「意志」 is a lasting resolve.
• Related決心けっしんNeutralMaking up one's mind, as in 「決心がつく」; stresses that the mind is set. 「意志」 stresses the strength to keep at it.
• Related自制心じせいしんNeutralThe ability to hold back emotions and desires; stresses self-restraint, while 「意志」 stresses the active resolve to do something.
• Related克己心こっきしんWrittenWritten/formal: the spirit of mastering one's own desires, with more of a self-discipline flavor than 「自制心」; 「意志」 stresses active resolve.
• Related精神力せいしんりょくNeutralMental toughness, as in 「精神力が強い」; stresses the capacity to endure. 「意志」 stresses the resolve to do something.
• Antonym無意志むいしWrittenAntonym, formal: occurring without one's own will, the opposite of 「意志」, which is about actively wanting to do something.

Use 「意志」 for the willpower to keep at something. For thoughts or intentions say 「意思」, for making up one’s mind 「決心」, for stubborn pride 「意地」, for holding back desires 「自制心」. 「精神力」 is mental toughness, 「決断」 a single decisive choice, and 「克己心」 and 「意力」 are formal written words; 「無意志」 is the formal antonym.

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

1. あることを積極的せっきょくてきにしようとする気持きもち。
2. はっきりと持もっている考かんがえ。