1. In an unfaithful undependable unreliable manner
   - unfaithfully, undependably

See also: unreliable

Antonym: reliably

• unstrung
• unstuck
• unstudied
• unstudious
• unstuff
• unstylish
• unsuasible
• unsubdivided
• unsubduable
• unsubdued
• unsubmissive
• unsubscribe
• unsubstantial
• unsubstantialise
• unsubstantialize
• unsubstantiated
• unsubtle
• unsuccessful
• unsuccessful person
• unsuccessfully
• unsufferable
• unsugared
• unsuitability
• unsuitable
• unsuitableness