These early reduplications are clearly a continuation of the repetitions observable in the earlier babbling, and grow out of the same motive, the impulse to go on doing a thing, and the pleasure of repetition and self-imitation. As is well known, these reduplications have their parallel in many of the names used by savage tribes.[89] ----- Footnote 89: See Tylor, _Primitive Culture_, i., 198. On the taking up of baby reduplications into language see the same work, i., 204. _Cf._ the same writer’s _Anthropology_, p. 129. ----- In addition to these palpable reduplications of sound-masses we have repetitions of single sounds, the repeated sound being substituted for another and foreign one. This answers to what is called in phonetics ‘assimilations’.[90] In the majority of cases the assimilation is ‘progressive,’ the change being carried out by a preceding on a succeeding sound. Examples are ‘Kikie’ for ‘Kitty,’ and ‘purpur’ for ‘purple’. This last transformation, though it was made by the little daughter of a distinguished philologist, was quite innocent of classical influence, and was clearly motived by the childish love of reduplication of sound. In many cases the substitution of an easy for a difficult sound seems to be determined in part by assimilation, as when ‘another’ was rendered by ‘annunner,’ ‘gateau’ (French) by ‘ca-co’. The assimilation seems, too, sometimes to work “regressively,” as when ‘thick’ becomes ‘kick,’ ‘Bonnie Dundee’ ‘Bun-dun,’ and ‘tortue’ (French) ‘tu-tu,’ in which two last reduplication is secured approximately or completely by change of vowel.[91] There seem also to be cases of what may be called partial assimilation, that is, a tendency to transform a sound into one of the same class as the first. “If (writes a mother of her boy) a word began with a labial he generally concluded it with a labial, making ‘bird,’ for example, ‘bom’.” But these cases are not, perhaps, perfectly clear examples of assimilation. ----- Footnote 90: See above, p. 137; _cf._ Sievers, _Phonetik_, p. 236. Footnote 91: Dr. Postgate suggests that the current terms ‘progressive’ and ‘regressive’ would be better rendered by ‘retrospective’ and ‘prospective’. ----- Along with the tendency to reduplicate syllabic masses, we see a disposition to use habitually certain favourite syllables as terminations, more particularly the pet ending ‘_ie_’. Thus ‘sugar’ becomes ‘sugie,’ ‘picture’ ‘pickie,’ and so forth. One child was so much in love with this syllable as to prefer it even to the common repetition of sound in onomatopoetic imitation, naming the hen not ‘tuck-tuck’ as one might expect, but ‘tuckie’.