-ile
/aɪl/suffix
1- forming adjectives and nouns such as agile and juvenile［构成形容词和名词, 如agile, juvenile］。
1.1
- Statistics forming nouns denoting a value of a variate which divides a population into the indicated number of equal-sized groups, or one of the groups itself【统计】［构成名词］表示“…等分”, “等份”：
decile
percentile.
词源
variant of -IL especially in adoptions from French.