根っから|ねっからnekkara[0]heiban (flat)

1. no-adjective, adverbby nature; from the very beginning; through and through; at heart
   彼女かのじょは根ねっからの冒険家ぼうけんかだ。↗

   She has an innate love of adventure.
2. no-adjective, adverbabsolutely (not); (not) at allfollowed by a verb in negative form

• Synonym生まれつきうまれつきNeutralMeans innate or inborn, as in 「生まれつき体が弱い」; it stresses what one is born with, while 「根っから」 stresses being that way through and through, at heart.
• Synonym生まれながらうまれながらWrittenMeans by birth or innate, close to 「生まれつき」 but leaning toward written prose; 「根っから」 is more colloquial and stresses being that way through and through.
• Synonym根からねからNeutralSame meaning as 「根っから」—by nature, or with a negation as 「根から〜ない」 for 'not at all'—but slightly more written in flavor.
• Synonym生得せいとくWrittenWritten/formal term for the innate or inborn, tending toward philosophical or psychological contexts, unlike the colloquial 「根っから」.
• Antonym後天的こうてんてきNeutralAntonym: describes traits or abilities acquired after birth rather than inborn—the opposite of 「根っから」's 'by nature' sense.
• Antonym付け焼刃つけやきばNeutralAntonym: hasty, stopgap knowledge or skill, or mere pretense for the moment—the opposite of 「根っから」's sense of being that way at heart.

Use 「根っから」 for being something through and through, as in 「根っからの江戸っ子」 or 「根っからの善人」, or with negation for 'not at all'. For innate traits say 「生まれつき」; in formal prose 「生まれながら」 or 「生得」; antonyms are 「後天的」 and 「付け焼刃」.

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

1. 本来ほんらいの性質せいしつとして；最初さいしょから最後さいごまで変かわらないさま。
2. 全まったく；少すこしも。否定ひていの表現ひょうげんと共ともに使つかう。