| Answer | Crossword Clue |
|---|---|
| whistle | shrill clear sound produced by forcing breath out or air in through the puckered lips |
| whistling | Emit a clear, high-pitched sound by forcing breath through a small hole between one's lips or teeth |
| fricative | (of a speech sound) characterized by audible friction produced by forcing the breath through a constricted or partially obstructed passage in the vocal tract; spirantal; spirant |
| spirant | (of a speech sound) characterized by audible friction produced by forcing the breath through a constricted or partially obstructed passage in the vocal tract; spirantal; spirant |
