Nonplussed
Adjective
Meaning
unsure about what to say, think, or do
Inchoate
Meaning
being only partly in existence or operation
Indefatigable
Adjective
Meaning
incapable of being fatigued
Dilatory
Adjective
Meaning
tending or intended to cause
Uncanny
Adjective
Meaning
being beyond what is normal or expected