Answer:

longi

Answer	Crossword Clue
LONGI	Extending a great distance (comb. form)
LONGI	Fine vowel sound?
LONGI	iPad feature?

LONGI	Night sound?
LONGI	Hi-fi sound?
LONGI	Vowel sound of "bite"
LONGI	Sound of fright
LONGI	What "idea" starts with
LONGI	Nice vowel sound?
LONGI	Neck muscles.
LONGI	Of considerable extent: Prefix.

LONGI	Extended: Prefix
LONGI	Counterpart of lati-
LONGI	One of a finite pair?
LONGI	Piece of pi?
LONGI	Capital of Iceland?
LONGI	Second in line?
LONGI	iPod sound?
LONGI	End of July by the sound?

LONGI	Sound of silence?
LONGI	Feature of the word 'like'
LONGI	"Aye," phonetically
LONGI	Eye, to the ear
LONGI	White noise?
LONGI	Repeated part of a five-mile hike?