1. Unshaken in purpose
   "wholly undismayed by the commercial failure of the three movies he had made"
   - undaunted, unshaken

See also: resolute

• unsweetened
• unswept
• unswerving
• unswervingly
• unsworn
• unsyllabic
• unsyllabled
• unsymbolic
• unsymmetric
• unsymmetrical
• unsymmetrically
• unsympathetic
• unsympathetically
• unsympathising
• unsympathizing
• unsynchronised
• unsynchronized
• unsynchronous
• exorciser
• exorcism
• exorcist
• exorcize
• exordial
• exordium
• exoskeletal