An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 1 Search : -ity
-ity
   -ای، -ایگی   
-i (#), -igi (#)

Fr.: -ité   

A suffix used to form abstract nouns expressing state, degree, or condition: metallicity, luminosity, periodicity, Gaussianity.

From M.E. -ite, from O.Fr. -ité, from L. -itas (-itat-), from -i- (thematic or, rarely, connective vowel) + -tas (-tat-), may be cognate with Av./Skt. -tāt (as in Av. uparatāt, Skt. uparátāt "supremacy," Av. haurvatāt, Skt. sarvátāt "completeness").

The suffix -igi, from -ig adj. suffix, variant of -ik, → -ic, + -i noun suffix.

Note: The Pers. suffix -i forms state/condition nouns from adjectives, as in: xubi, zešti, râsti, âzâdi, tanhâyi. There is though a phonetic problem when the adj. ends in -i, since two successive i's are not easily articulable, e.g.: felez "metal," felezi "metallic," *felezii "metallicity." Mid.Pers. did not have this problem, since the adj. suffix was -îg or -îk (instead of -i) and the noun suffix -îh (instead of -i). Some examples in Mid.Pers.: tuhîg "empty," tuhîgîh "emptiness," tuwânîg "able," tuwânîgîh "ability," spurrîg "complete," spurrîgîh "completeness, perfection," nazdîk "near," nazdîkîh "proximity." A way out of this phonetic problem is to use the Mid.Pers. -igi. This solution, first introduced in the case of tohi, tohigi (→ void), was generalized by M. Sch. Adib-Soltâni (Irânigi, Âlmânigi, darunâxtigi, borunâxtigi, etc.). This seems a natural solution since the adj. suffix -i is the evolution of the Mid.Pers. -ig, and moreover Pers. currently revives the g phoneme in comparable phonetic situations, as in the ending phoneme (-eh), which derives from Mid.Pers. -ag. A number of examples: adj. âzâdé, n. âzâdegi; adj. tâbandé, n. tâbandegi; adj. mardâné, n. mardânegi; likewise xâné, xânegi, setâré, setâregân; âzâdé, âzâdegân. Interestingly, the -igi suffix has this specified function in some dialects, for example (Tajik, Šahrezâ-yi) xâligi "emptiness," from xâli.
Some examples for the use of -igi in this work: felezigi, → metallicity; mâddigi, → materiality; beyzigi, → ellipcity, tâštigi, → certainty, etc.