English
eleventeenth
From eleventeen + -th (ordinal suffix).
Formed from eleventeen + -th
Proto-Indo-European *leyp- ‘to stick’
…
Proto-West Germanic *ainalifun
Old English endleofan ‘eleven’
Middle English elleven ‘eleven’
English eleven
English eleventeen
Today it means
adj The ordinal form of the number eleventeen.
Language periods are conventional ranges, not dates for this word.
Etymograph / eleventeenth