出典:Wiktionary
Learned borrowing from Late Latin tractilis (“that can be dragged または pulled”) + English -ile (suffix meaning ‘capable of; tending to’). Tractilis is derived from Latin tractus + -ilis (suffix forming adjectives from the perfect passive participles of verbs); and tractus is the perfect passive participle of trahō (“to drag, pull; to draw out, extend, lengthen, prolong”),[1][2] probably ultimately from Proto-Indo-European *dʰregʰ- (“to drag, pull; to run”).
tractile (comparative more tractile, superlative most tractile)