Definitions of askance:

• adjective:   (used especially of glances) directed to one side with or as if with doubt or suspicion or envy

  Example: "Her eyes with their misted askance look- Elizabeth Bowen"

• adverb:   with a side or oblique glance

  Example: "Did not quite turn all the way back but looked askance at me with her dark eyes"

• adverb:   with suspicion or disapproval

  Example: "He looked askance at the offer"