1. Not admitting of passage or capable of being affected
   - impervious

See also: acid-fast, colorfast [US], colourfast [Brit, Cdn], corrosion-resistant, fast, greaseproof, impermeable, ladder-proof, mothproof, moth-resistant, proof, resistant, rot-resistant, runproof, run-resistant, soundproof

• arteria temporalis anterior
• arteria temporalis intermedia
• arteria temporalis posterior
• arteria testicularis
• arteria ulnaris
• arteria uterina
• arteria vaginalis
• arteria vertebralis
• arterial
• arterial blood
• arterial blood gases
• arterial blood vessel
• arterial plaque
• arterial pressure
• arterial road
• arterial sclerosis
• arterialise
• arterialize
• arteriectasia
• arteriectasis
• arterio-
• arteriogram
• arteriography
• arteriola
• arteriolar