shirabe.org
1)

芯しん

#5,001
Common
しん
Meaning
    1. ①
      wick; marrow; staple (for stapler); (pencil) lead; stuffing; pith
      シャーペンの芯しん２に・３本さんぼんもらえるかな。
      Could you lend me a few mechanical pencil leads?
    2. ②
      core; heart; centre; center
      See also: 心 (こころ)
      私わたくしは体からだの芯しんまで冷ひえ切きった。
      I was frozen to the bone.
    3. ③
      pistil (of a flower)
      See also: 蕊 (しべ)
    4. ④
      stamen
      See also: 蕊 (しべ)
Kanji
芯 シン wick
Forms
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2)

芯しん

#5,001
しん
Meaning
    1. Shin
Kanji
芯 シン wick
Forms
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9)

芯しんを食くう

#130,842

Inflections of 芯を食う
しんをくう
✨
Meaning
    1. ①
      to get to the heart of the matter; to get to the core
    2. ②
      sports
      to hit (a ball) with the sweet spot (of a golf club, baseball bat, etc.)
Kanji
芯 シン wick 食 ショク eat, food
Forms
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12)

芯しんケース

#273,805
しんケース
Meaning
    1. pencil lead case (for a mechanical pencil)
Kanji
芯 シン wick
Forms
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