All falseheartedly synonyms

adverb falseheartedly

• deceitfully — given to deceiving: A deceitful person cannot keep friends for long.
• maliciously — full of, characterized by, or showing malice; intentionally harmful; spiteful: malicious gossip.
• basely — morally low; without estimable personal qualities; dishonorable; meanspirited; selfish; cowardly.
• behind one's back — without one's knowledge; secretly or deceitfully
• crookedly — not straight; bending; curved: a crooked path.
• dishonestly — In a dishonest manner.
• dishonourably — (British) alternative spelling of dishonorably.
• dishonorably — In a dishonorable manner.
• disloyally — In a disloyal manner.
• faithlessly — In a faithless manner.
• malevolently — wishing evil or harm to another or others; showing ill will; ill-disposed; malicious: His failures made him malevolent toward those who were successful.
• perfidiously — deliberately faithless; treacherous; deceitful: a perfidious lover.
• roguishly — pertaining to, characteristic of, or acting like a rogue; knavish or rascally.
• traitorous — having the character of a traitor; treacherous; perfidious.
• treacherously — characterized by faithlessness or readiness to betray trust; traitorous.
• underhanded — underhand.
• unfaithful — not faithful; false to duty, obligation, or promises; faithless; disloyal.
• unscrupulously — not scrupulous; unrestrained by scruples; conscienceless; unprincipled.