sap·less 
(săplĭs)
(săplĭs)adj.
1. Devoid of sap; dry.
2. Lacking spirit or energy.
sapless·ness n.
- irradiant
- irradiate
- irradiation
- irradiative
- irradiator
- irradicable
- irradicably
- irrational
- irrationalism
- irrationality
- irrationally
- irrationalness
- irrational number
- Irrawaddy
- irreal
- irreality
- irreclaimability
- irreclaimable
- irreclaimableness
- irreclaimably
- irreconcilability
- irreconcilable
- irreconcilably
- irrecoverable
- irrecoverably