Inscrutable
Expressionless, vacant
Zenith
Top, peak
Affable
Agreeable, genial
Incantation
Invocation, spell
Impartinent
Audacious, impolite
Quailed
Flinched, recoiled
Insinuation
Imputation, hint
Debacle
Collapse, catastrophe
Floundering
Struggling, thrashing
Inveterate
Congenital, ingrained
Demeanor
Attitude, bearing
Infallible
Uncanny, accurate
Rampage
Riot, storm
Unequivocal
Explicit, specific