- The largest living sea turtle(Dermochelys coriacea), found in tropical waters and having a tough, leathery carapace with seven longitudinal ridges. 棱皮龟：最大的海生龟（棱皮龟） ，生活于热带海域，坚韧的皮质背壳中有七根纵向骨脊
- irreplaceable
- irrepressible
- irrepressibles
- irreproachable
- irresistable
- irresistible
- irresistibles
- irresoluble
- irresolute
- irresolvable
- irrespective
- irrespectively of
- irrespective of
- irrespirable
- irresponsible
- irresponsive
- irretrievable
- irreverence
- irreverences
- irreverent
- irreversible
- irrevocable
- irridenta
- irrigable
- irrigatable