The first use as a word combination appeared in Lewis Carroll's book "Through the Looking-Glass". There Humpty Dumpty explains that some of the unusual words in "Jabberwocky" are other words packed together into one word, as two parts of a portmanteau suitcase are packed together.
ð ə WORD_BOUNDARY f ɜː s t WORD_BOUNDARY j uː s WORD_BOUNDARY æ z WORD_BOUNDARY ʌ WORD_BOUNDARY w ɜː d WORD_BOUNDARY k ɑ m b ɪ n eɪ ʃ ə n WORD_BOUNDARY ʌ p ɪ ɹ d WORD_BOUNDARY ɪ n WORD_BOUNDARY l uː ɪ s WORD_BOUNDARY k æ ɹ oʊ l z WORD_BOUNDARY b ʊ k WORD_BOUNDARY θ ɹ uː WORD_BOUNDARY ð ə WORD_BOUNDARY l ʊ k ɪ ŋ ɡ l æ s WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY h ʌ m p t i WORD_BOUNDARY d ʌ m p t i WORD_BOUNDARY ɛ k s p l eɪ n z WORD_BOUNDARY ð æ t WORD_BOUNDARY s ʌ m WORD_BOUNDARY ʌ v ð ɪ WORD_BOUNDARY ʌ n j uː ʒ uː ə l WORD_BOUNDARY w ɜː d z WORD_BOUNDARY ɪ n WORD_BOUNDARY d̠ʒ æ b ə ɹ w ɑ k i WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY ʌ ð ə ɹ WORD_BOUNDARY w ɜː d z WORD_BOUNDARY p æ k t WORD_BOUNDARY t ə ɡ ɛ ð ə ɹ ɹ WORD_BOUNDARY ɪ n t ʊ WORD_BOUNDARY w ʌ n WORD_BOUNDARY w ɜː d WORD_BOUNDARY æ z WORD_BOUNDARY t uː WORD_BOUNDARY p ɑ ɹ t s WORD_BOUNDARY ə v ə WORD_BOUNDARY p ɔ ɹ t m ʌ n t oʊ WORD_BOUNDARY s uː t k eɪ s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY p æ k t WORD_BOUNDARY t ə ɡ ɛ ð ə ɹ WORD_BOUNDARY