Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *h₂eḱ-

→ English oxymoron (root)
→ English acid (root)
→ English acronym (root)
→ English acacia (root(en/nl))
→ English acerbity (root)
→ English acerbate (root)
→ English hear (mention)
→ English ear (inherited)
→ English ear (root)
→ English axe (mention)
→ English acidity (root)
→ English cute (root)
→ English hammer (mention)
→ English hammer (root)
→ English oxygen (root)
→ English acerose (root)
→ English acetic (root)
→ English acute (root)
→ English acute (derived)
→ English aglet (root)
→ English acrid (root)
→ English acrobat (root)
→ English acumen (root)
→ English edge (root)
→ English edge (derived)
→ English acicular (root)
→ English acuity (root)
→ English acuminate (root)
→ English acupuncture (root)
→ English awn (derived)
→ English oxide (root)
→ English exacerbate (root)
→ English acme (root)
→ English acne (root)
→ English eager (root)
→ English paragon (derived)
→ English ester (root)
→ English mediocre (root)
→ English oxy- (root)
→ English acrimonious (root)
→ Old English ear (inherited)
→ Old English æx (mention)
→ Asturian aguya (derived)
→ Catalan acer (derived)
→ Catalan agulla (derived)
→ Cimbrian égata (inherited)
→ Old Church Slavonic камꙑ (root)
→ Old Church Slavonic осла (root)
→ Old Church Slavonic остръ (root)
→ Welsh eithin (inherited)
→ Danish økse (mention)
→ German Uwe (cognate)
→ German Ähre (derived)
→ Emilian agåccia (derived)
→ Emilian gùcia (derived)
→ Emilian gùccia (derived)
→ Spanish acero (derived)
→ Spanish aguja (derived)
→ Spanish acedera (derived)
→ Persian سنگ (derived)
→ Persian آهو (derived)
→ Persian آس (derived)
→ Persian انبر (mention)
→ Finnish kasa (cognate)
→ Finnish ohra (root)
→ Faroese egg (derived)
→ Faroese øks (mention)
→ Faroese hamar (mention)
→ French acier (derived)
→ Irish achar (root)
→ Irish achar (mention)
→ Irish aiteann (root)
→ Irish aiteann (inherited)
→ Irish acra- (root)
→ Irish aichear (root)
→ Irish aichear (derived)
→ Scottish Gaelic aiteann (inherited)
→ Galician gume (inherited)
→ Westrobothnian iks (mention)
→ Gothic 𐌰𐌷𐌰𐌺𐍃 (derived)