From <span class="searchmatch">Proto</span>-Indo-European *h₃r̥dʰwós. Cognate with Latin arduus. *<span class="searchmatch">ardwos</span> high <span class="searchmatch">Proto</span>-Brythonic: *arð Middle Welsh: arð Welsh: ardd Cornish: ardh, arth Old...
(“increased, thriving”) <span class="searchmatch">Proto</span>-Indo-Aryan: *Hr̥ddʰás Sanskrit: ऋद्ध (ṛddhá) ⇒ Sanskrit: समृद्ध (sámṛddha) *h₃r̥dʰ-wó-s <span class="searchmatch">Proto</span>-<span class="searchmatch">Celtic</span>: *<span class="searchmatch">ardwos</span> (“high”) Old Irish:...