in faith
By my word
In faith is an old-fashioned expression used to emphasize the truth or sincerity of what one is saying, similar to truly or indeed.
It once served as a mild oath, invoking one's religious faith as a guarantee of honesty: In faith, I never meant to cause offense.
The phrase appears frequently in older literature and formal speech but has largely fallen out of everyday use.
honestly
In a truthful manner
sincerely · truthfully · really · indeed · verily · candidly · actually · certainly · surely · assuredly
pledge
Binding promise given
sworn · affirmation · declaration · bond · testament · word · assurance · troth · plight · solemn
in faithinsincerely
Without true feeling
in bad faith · sarcastically · falsely · dishonestly · in jest
in faithin doubt
Feeling uncertain, wavering
in disbelief · incredulously · dubiously · mistrustfully · empirically
in faithhalfheartedly
Without real interest
reluctantly · uncertainly · doubtfully · tentatively · waveringly
faith, faithful, faithfully, faithfulness, faithless, faithlessness, unfaithful, unfaithfully, unfaithfulness