シェアshea

1. noun, suru verb, transitive verbsharing; share (on social media)
2. nounmarket share
   私達わたしたちの市場シェアしじょうしぇあは２０％です。↗

   We have a 20% share of the market.

• Synonym分け前わけまえNeutralThe portion each person gets after dividing something up, as in 「分け前をもらう」; colloquial in flavor, stressing what one personally receives.
• Synonym取り分とりぶんNeutralThe share one is entitled to, stressing the part one has a right to claim; シェア stresses sharing or share of the market.
• Synonym持ち分もちぶんWrittenOne's proportionate right in jointly owned property or in a company; a legal and commercial term.
• Related割り当てわりあてNeutralA quota or portion assigned out, as in 「割り当て量」; stresses allocation by a set standard, while シェア stresses sharing or market share.
• Related配分はいぶんWrittenDistributing resources, time, etc. in proportion, as in 「時間配分」; a written, formal word, while シェア centers on sharing.
• Related配当はいとうWrittenDividends paid on stock, or apportionment of shares; a financial term, as in 「株式配当」. シェア has no dividend sense.
• Antonym独占どくせんWrittenFormal term for one party monopolizing everything, the opposite of the sharing in シェア, as in 「市場を独占する」.

Use 「シェア」 for market share, social-media sharing, or shared housing (「市場シェア」「シェアハウス」). For one's allotted portion use 「分け前」 or 「取り分」, for quotas 「割り当て」, for equity stakes 「持ち分」, and for monopoly 「独占」.

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

1. 共有きょうゆう。分配ぶんぱい。
2. 市場占有率しじょうせんゆうりつ。