1060: Vowel Harmonization Nov 3, 2017

In English, an affix can be said to be more or less productive, but whether it can attach to fewer than 50 nouns as in the case of '-th' or thousands, as in the case of '-ness', the affix will not change its form. Occasionally whole words change over time, such as what would have been something like 'youngth' becoming 'youth', but this is not systematic in any way. Meanwhile, in some Uralic and Turkic languages, vowels have to harmonize with the word to which the affix is bound. For instance, a multiplicative ending, similar to '-(i)ce' in 'once' or 'thrice' in Hungarian is '-szor' for certain vowels (back vowels) like in 'hatszor' but will appear as '-szer' and '-ször' when harmonizing with front vowels or front rounded vowel respectively.