Where does “xylophone” come from?

Xylophone comes from Ancient Greek xylo- (wood) and φωνή (sound, voice), ultimately from Proto-Indo-European bʰeh₂- (to speak or resound).

xylophone (English): Any musical instrument made of wooden slats...

Definitions

xylophone traces back through 3 separate lines of ancestry.

Step	Language	Word	Meaning
1	English	phone	A device for transmitting conversations and other...
2	English	telephone	A telecommunication device used for two-way...
3	French	téléphone	telephone; first-person singular present...
4	French	télé-	tele-
5	Ancient Greek	τῆλε	far off, afar, far away
6	Latin	commūnicāre	—
7	Latin	commūnis	common, commonplace, ordinary, general, universal, shared, shared alike, of both sides, belonging to two or more together
8	Old Latin	com(m)oinis	—
9	Proto-Italic	kommoinis	common
10	Proto-Indo-European	ḱom-moy-ni-	held in common
11	Proto-Indo-European	ḱóm	beside, near, by, with
12	Proto-Indo-European	ḱe	Deictic particle, here; Post-positional...
13	Middle English	kyt	—
14	German	kitt	putty certain kinds of cement used for fixing e.g. window panes
15	Old High German	kuti	—
16	Proto-West Germanic	kwidu	gum, resin
17	Proto-Germanic	kweduz	resin
18	Proto-Indo-European	gʷet-	resin, gum; to say, speak
19	Proto-Indo-European	gū-	to bend; curve; arch; vault; to bow, bend, arch,...

Step	Language	Word	Meaning
1	Ancient Greek	ξύλον	cut wood, timber; piece of wood, log, beam, post;...
2	Ancient Greek	-ουργός	worker, maker; work; worker, maker, craftsman
3	Ancient Greek	ἔργον	deed, doing, action; labour, work, task;...
4	Proto-Hellenic	wérgon	work
5	Proto-Indo-European	wérǵom	work
6	Proto-Indo-European	werǵ-	to make

Step	Language	Word	Meaning
1	English	xylo	xylophone