be, feel, look, seem

extremely, very | fairly, pretty, quite, reasonably
That seems like fairly sound advice.

structurally
Is the building structurally sound?

safe and sound
(= not hurt) We arrived home safe and sound.

be, seem

extremely, very | absolutely, perfectly
She had a perfectly sound reason for acting as she did.

fairly, pretty, reasonably | basically, fundamentally | commercially, ecologically, environmentally, financially, ideologically, theoretically
It was a financially sound investment.

big, deafening, loud, powerful
We need a big powerful sound from the trumpets in the final passage.

audible | faint, little, soft | high | deep, low | clean, clear, sharp
He produces a good clean sound on his flute.

piercing | muffled | amazing, beautiful, good, lovely, pleasing | awful, horrible, sickening
There was a sickening sound as his head made contact with the concrete.

familiar, strange | distinctive | haunting | booming, buzzing, clanking, etc. | metallic | hollow | distorted | distant
the distant sound of church bells

guitar, piano, etc.
She tried to describe what made a good guitar sound.

speech, vowel

hear | emit, make, produce, pronounce, transmit, utter
What''s making that awful creaking sound? | Three bones transmit sounds to the inner ear. | He didn''t utter a single sound throughout the meeting.

carry, travel
Sound carries well over calm water.

come
A strange sound came from the box.

echo | die away

wave | effect | bite
As a politician he is a master of the 30-second sound bite.

at the ~ of
He turned around at the sound of footsteps behind him.

without a ~
The door opened without a sound.

~ of
the sound of breaking glass

~ from
There was a strange sound from downstairs.

the speed of sound 2 the sound
from television/radio, etc.

recorded | mono, stereo

turn down/up
Can you turn the sound up?

level, quality | system
a stereo sound system

recording | recorder | engineer