and front/palatal , there are few cases of a corresponding approximant . One is in the Korean diphthong or though it is more frequently analyzed as velar (as in the table above), and Mapudungun may be another, with three high vowel sounds, , , and three corresponding consonants, , and , and a third one is often described as a voiced unrounded velar fricative; some texts note a correspondence between this approximant and that is parallel to – and –. An example is liq (?) ('white'). It has been noted that the expected symbols for the approximant correlates of are or . Approximants versus fricatives In addition to less turbulence, approximants also differ from fricatives in the precision required to produce them. When emphasized, approximants may be slightly fricated (that is, the airstream may become slightly turbulent), which is reminiscent of fricatives. For example, the Spanish word ayuda ('help') features a palatal approximant that is pronounced as a fricative in emphatic speech. Spanish can be analyzed as having a meaningful distinction between fricative, approximant, and intermediate . However, such frication is generally slight and intermittent, unlike the strong turbulence of fricative consonants. For places of articulation further back in the mouth, languages do not contrast voiced fricatives and approximants. Therefore, the IPA allows the symbols for the voiced fricatives to double for the approximants, with or without a lowering diacritic. Occasionally, the glottal "fricatives" are called approximants, since typically has no more frication than voiceless approximants, but they are often phonations of the glottis without any accompanying manner or place of articulation. Central approximants bilabial approximant (usually transcribed ) labiodental approximant dental approximant (usually transcribed ) alveolar approximant retroflex approximant (a consonantal ) palatal approximant (a consonantal ) velar approximant (a consonantal ) uvular approximant (usually transcribed ) pharyngeal approximant (a consonantal ; usually transcribed ) breathy-voiced glottal approximant creaky-voiced glottal approximant Lateral approximants In lateral approximants, the center of tongue makes solid contact with the roof of the mouth. However, the defining location is the side of the tongue, which only approaches the teeth, allowing free passage of air. voiced alveolar lateral approximant retroflex lateral approximant voiced palatal lateral approximant velar lateral approximant uvular lateral approximant Coarticulated approximants with dedicated IPA symbols labialized velar approximant (a consonantal ) labialized palatal approximant (a consonantal ) Voiceless approximants Voiceless approximants are not recognized by all phoneticians as a discrete phonetic category.