1. To double the degree
   "she was doubly rewarded"
   - double, twice 
2. In a twofold manner
   "he was doubly wrong"
   - in two ways

See also: double

• inertly
• inertness
• inescapable
• inescapably
• inessential
• inessentiality
• inestimable
• inestimably
• inevitability
• inevitable
• inevitable accident
• inevitableness
• inevitably
• inexact
• inexactitude
• inexactly
• inexactness
• inexcusable
• inexcusably
• inexhaustible
• inexhaustibly
• inexistence
• inexistent
• inexorability
• inexorable