cheat

1 cheat /ˈtʃiːt/ verb
cheats; cheated; cheating
1 cheat
/ˈtʃiːt/
verb
cheats; cheated; cheating
Britannica Dictionary definition of CHEAT
1 
[no object] : to break a rule or law usually to gain an advantage at something
— often + on or at
2 
[+ object]
a  : to take something from (someone) by lying or breaking a rule
— usually + out of
b  : to prevent (someone) from having something that he or she deserves or was expecting to get — usually used in the phrase feel cheated
3 
[+ object] : to avoid (something bad, dangerous, etc.) by being clever or lucky

cheat on

[phrasal verb]
cheat on (someone) informal
: to break a promise made to (someone, such as your wife or husband) by having sex with someone else

— cheater

noun, plural cheaters [count]
2 cheat /ˈtʃiːt/ noun
plural cheats
2 cheat
/ˈtʃiːt/
noun
plural cheats
Britannica Dictionary definition of CHEAT
[count]
: a person who cheats