Firstly, we have the witness that they were trying to crush each other to pieces in the womb. That is the meaning of the word, ratsats in Gen 25:22,
ratsats: to crush
Original Word: רָצַץ
Definition: to crush, to crush to pieces, and in the reciprocal use, to crush each other to pieces... NOT to struggle wrestle nor jostle each other. Why do the commentators all change this word to deny their destructive intent? Because it does not conform to their belief that they are newly created as tabula rasa and is an eisegetic expression of their belief, not the actual meaning of the word.
(rṣṣ), vb. mistreat, oppress; shatter, smash, smite, strike down. Greek equiv. fr. LXX: θλάω (6), θραύω (2), ἐκπιέζω (1), κλάω (1).
Verb Usage
1. to break (destroy)† — to destroy the integrity of; usually by force; cause to separate into pieces or fragments. Stems: nifal, 1. See also שׁבר 1. Related Topic: Break.
nifal
Eze 29:7 בְּתָפְשָׂ֨ם בְּךָ֤ בַכַּפְךָ תֵּר֔וֹץ
—
2. to oppress† — to come down on or keep down by unjust use of one’s authority. Stems: qal, 3; piel, 2. Related Topics: Oppression; Oppressor.
qal
1 Sa 12:3 וְאֶת־מִ֤י עָשַׁ֙קְתִּי֙ אֶת־מִ֣י רַצּ֔וֹתִי
1 Sa 12:4 וְלֹ֣א רַצּוֹתָ֑נוּ
Am 4:1 הָעֹשְׁק֣וֹת דַּלִּ֔ים הָרֹצְצ֖וֹת אֶבְיוֹנִ֑ים
piel
Job 20:19 כִּֽי־רִ֭צַּץ עָזַ֣ב דַּלִּ֑ים
2 Ch 16:10 וַיְרַצֵּ֥ץ אָסָ֛א מִן־הָעָ֖ם
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3. to crush (break in pieces)† — to break into small pieces. Stems: hifil, 1; poel, 1; piel, 1. Related Topic: Break.
hifil
Jdg 9:53 וַתָּ֖רִץ אֶת־גֻּלְגָּלְתּֽוֹ׃
poel
Jdg 10:8 וַֽיִּרְעֲצ֤וּ וַיְרֹֽצְצוּ֙
piel
Ps 74:14 אַתָּ֣ה רִ֭צַּצְתָּ רָאשֵׁ֣י לִוְיָתָ֑ן
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4. to be crushed (broken) — to be broken into small pieces. Stems: qal, 5; nifal, 1. Related Topic: Break.
qal
2 Ki 18:21|| עַל־מִשְׁעֶנֶת֩ הַקָּנֶ֨ה הָרָצ֤וּץ הַזֶּה֙
Is 36:6|| עַל־מִשְׁעֶנֶת֩ הַקָּנֶ֨ה הָרָצ֤וּץ הַזֶּה֙
Is 42:3 קָנֶ֤ה רָצוּץ֙ לֹ֣א יִשְׁבּ֔וֹר
Is 42:4 לֹ֤א יִכְהֶה֙ וְלֹ֣א יָר֔וּץ
Ec 12:6 וְתָרֻ֖ץ גֻּלַּ֣ת הַזָּהָ֑ב
nifal
Ec 12:6 וְנָרֹ֥ץ הַגַּלְגַּ֖ל
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5. to struggle† — to make a strenuous or labored effort; often, but not necessarily, physical. Stems: hitpoel, 1. Related Topic: Labor.
hitpoel
Ge 25:22 וַיִּתְרֹֽצֲצ֤וּ הַבָּנִים֙
—
6. to be oppressed (state)† — to be in a state of burden; perhaps due to imprisonment. Stems: qal, 3. Related Topics: Oppression; Oppressor.
qal
Dt 28:33 רַ֛ק עָשׁ֥וּק וְרָצ֖וּץ
Is 58:6 וְשַׁלַּ֤ח רְצוּצִים֙ חָפְשִׁ֔ים
Ho 5:11 עָשׁ֥וּק אֶפְרַ֖יִם רְצ֣וּץ מִשְׁפָּ֑ט
Rick Brannan, ed., Lexham Research Lexicon of the Hebrew Bible (Lexham Research Lexicons; Bellingham, WA: Lexham Press, 2020).
8368 רָצַץ (rā·ṣǎṣ): v.; ≡ Str 7533; TWOT 2212—1. LN 22.21–22.28 (qal) oppress, i.e., cause the trouble, hardship, and harassment of an opponent or enemy, as a figurative extension of hitting an object with physical impact (1Sa 12:3, 4; Am 4:1+); (qal pass.) oppress (Dt 28:33; Isa 58:6; Hos 5:11+); (nif) oppressed, feel discouragement of oppression (Isa 42:4 cj+), see also domain LN 25.288–25.296; (piel) oppress (2Ch 16:10; Job 20:19+); (polel) oppress (Jdg 10:8+); 2. LN 19.1–19.13 (qal) break, smash, i.e., make physical impact on an object by hitting or striking, with the result being a shattering or splintering of a relatively brittle object into pieces or strips (2Ki 23:12; Ecc 12:6a+); (qal pass.) be smashed, broken, splintered (2Ki 18:21; Isa 36:6; 42:3+); (nif) broken, be splintered (Ecc 12:6b; Eze 29:7+); (piel) crack open, crush (Ps 74:14+); (hif) crack open, crush to pieces (Jdg 9:53+), note: see also domain LN 19.34–19.42; 3. LN 50 (hitpolel) struggle together, jostle each other, i.e., have a physical contest to gain a superior position over an opponent, as in a wrestling match (Ge 25:22+), note: some parse Isa 42:4 and 2Ki 23:12 as 8132
James Swanson, Dictionary of Biblical Languages with Semantic Domains : Hebrew (Old Testament) (Oak Harbor: Logos Research Systems, Inc., 1997).
7533. רָצַץ rāṣāṣ: A verb meaning to break; to crush; to oppress. It is used of infants tussling while still in the womb, pushing on each other (Gen. 25:22). It describes one nation crushing, oppressing another nation as part of God’s judgments (Deut. 28:33; Judg. 10:8). It refers to physically crushing something, e.g., a person’s head (Judg. 9:53); or other physical objects (2 Kgs. 23:12). It is used of treating another person unfairly or violently in any way, even unknowingly (1 Sam. 12:3, 4). It describes the smashing of Leviathan’s head, the monster’s head (Ps. 74:14). Its use in Ecclesiastes 12:6 is figurative, breaking the golden bowl of life, dying. Egypt is figuratively described as a crushed reed (Isa. 36:6). It describes the breaking or ripping open of a person’s hands, again in a figurative sense of nations (Ezek. 29:7). Crushed by judgment from God describes the state of a nation receiving God’s devastating blows (Hos. 5:11). The rich cows of Bashan women are described as crushing the needy to meet their luxurious needs (Amos 4:1)
Warren Baker and Eugene E. Carpenter, The Complete Word Study Dictionary: Old Testament (Chattanooga, TN: AMG Publishers, 2003), 1075–1076.