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lilac [lilac 词源字典]: lilac: [17] Like the river Nile, the lilac gets its name from its colour. The Sanskrit word for ‘dark blue’ was nīla. This passed into Persian as nīl, from which was derived nīlak ‘bluish’. This developed a variant līlak, which English acquired via Arabic līlak, Spanish lilac, and early modern French lilac. Along the way it was applied to a shrub of the genus Syringa, on account of its mauve flowers.
[lilac etymology, lilac origin, 英语词源]
Delilah: "temptress, treacherous lover," 1590s, from the name of the woman who seduced and betrayed Samson in Judges, from Hebrew Delilah, literally "delicate, languishing, amorous," from Semitic root d-l-l "to hang down, to languish."
lilac (n.): 1620s, from French lilac "shrub of genus Syringa with mauve flowers," from Spanish lilac, from Arabic lilak, from Persian lilak, variant of nilak "bluish," from nil "indigo" (compare Sanskrit nilah "dark blue"), of uncertain origin. As a color name, attested from 1791; as a scent, from 1895. As an adjective, "pale pinkish-purple," from 1801. Related: Lilaceous.
palilalia: "A speech disorder characterized by involuntary repetition of words, phrases, or sentences", Early 20th century: from French palilalie, from Greek palin 'again' + lalia 'speech, chatter'.