bye-bye
UK: ˈbaɪbaɪ | US: ˈbaɪbaɪ
n. a child’s term for "goodbye"
n. (informal) a farewell or departure
"Bye-bye" originated as a reduplication of "bye," itself a shortened form of "goodbye." The repetition mimics child-directed speech, making it easier for young children to pronounce and remember. "Goodbye" traces back to the 16th-century phrase "God be with ye," which contracted over time. The playful doubling reflects linguistic patterns common in nursery language, reinforcing simplicity and affection.
The toddler waved and said, "Bye-bye!" to her grandmother.
"Bye-bye, see you tomorrow!" he called as he left the room.
She blew kisses and whispered "bye-bye" to her baby brother.
After the party, it was time to say bye-bye to all the guests.
The puppy barked a cheerful bye-bye as its owner drove away.