| Voiceless velar fricative | |
|---|---|
| x | |
| IPA Number | 140 |
| Audio sample | |
| Encoding | |
| Entity (decimal) | x |
| Unicode (hex) | U+0078 |
| X-SAMPA | x |
| Braille |  |
The voiceless velar fricative is a type of consonantal sound used in some spoken languages. It was part of the consonant inventory of Old English and can still be found in some dialects of English, most notably in Scottish English, e.g. in loch, broch or saugh (willow).
The symbol in the International Phonetic Alphabet that represents this sound is ⟨x⟩, the Latin letter x. It is also used in broad transcription instead of the symbol ⟨χ⟩, the Greek chi, for the voiceless uvular fricative.
There is also a voiceless post-velar fricative (also called pre-uvular) in some languages, which can be transcribed as [x̠] or [χ̟]. For voiceless pre-velar fricative (also called post-palatal), see voiceless palatal fricative.
Some scholars also posit the voiceless velar approximant distinct from the fricative, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ɰ̊⟩, but this symbol is not suitable in case of the voiceless velar approximant that is unspecified for rounding (the sound represented by the symbol ⟨ɰ̊⟩ is specified as unrounded), which is best transcribed as ⟨x̞⟩, ⟨ɣ̞̊⟩ or ⟨ɣ̊˕⟩ - see voiced velar approximant. The velar approximant can in many cases be considered the semivocalic equivalent of the voiceless variant of the close back unrounded vowel ⟨ɯ̊⟩.