selon

Etymology
,, from earlier , , , probably from a , from + , possibly a. Alternatively from a supposed, an old form of (itself from Latin ; compare 🇨🇬), later crossed with ,.

Preposition

 * 1) according to; whichever applies; depending on

Usage notes

 * Unlike most other bi- or multisyllabic French prepositions, which allow optional phonological,  does not form with subsequent vowel-initial words.