1 (slang) very close same-sex friend

2 gay partner

1 base (of operations)

2 industrial or military base

3 al-Qaeda

1 basic

2 fundamental

3 main

4 elementary

1 base

2 foundation

3 basis

4 underlying

5 classifier: 个 gè

1 voice

2 sound

3 classifier: 个 gè

1 the sound of footsteps in a deserted valley (idiom)

2 sth hard to come by

3 sth wonderful and rare

1 to understand the unspoken implications (idiom)

1 reverberates around the rafters (idiom); fig. sonorous and resounding (esp. of singing voice)