How do we pronounce sustainable?

What is the meaning of sustainable?

1 : capable of being sustained. 2a : of, relating to, or being a method of harvesting or using a resource so that the resource is not depleted or permanently damaged sustainable techniques sustainable agriculture.

Is the L in vulnerable silent?

The Word ‘vulnerable‘ is tough: two Dark L’s and the schwa-R sound.

Which pronunciation of either is correct?

Using English phonetics, [ EE-ther ] and [ AHY-ther ] are both correct. As a side note, giving “th” a phonetic Z (or S or F or D) sound is a common mispronunciation that can be corrected with practice.