boulderboulder /ˈboʊldɚ/ ●○○ noun [countable] 
a large stone or piece of rock: Two huge boulders blocked the road.
a large stone or piece of rock: Two huge boulders blocked the road.- irreligious
- irremediable
- irremediably
- irreparable
- irreparably
- irreplaceable
- irrepressible
- irrepressibly
- irreproachable
- irreproachably
- irresistible
- irresistibly
- irresolute
- irresolutely
- irresolution
- irrespective
- irresponsibility
- irresponsible
- irresponsibly
- irretrievable
- irretrievably
- irreverence
- irreverent
- irreverently
- irreversible