"Say goodbye" doesn't necessarily mean "to speak the words 'goodbye'". I'm not an English expert, but I think that waving with your hand is also "saying goodbye

"Say goodbye" doesn't necessarily mean "to speak the words 'goodbye'". I'm not an English expert, but I think that waving with your hand is also "saying goodbye". And if that's true, then "żegnać" is the same as "saying goodbye".