Sangheili uses Standard American Romanization. Ejective consonants are written with a following apostrophe, and the r is the tap [ɾ]. The language has long vowels, represented by a doubled vowel, and occasionally has geminates, also written doubly. Likely the most challenging aspect of the phonology are the consonants with a velar release. These are written as if they began with a consonant cluster, but they occur at every point of articulation—namely, pkh [pˣ], tkh [tˣ], kkh [kˣ], and qkh [qˣ], and even the fricative (or fricative-ending) consonants skh [sˣ], shkh [ʃˣ], and chkh [tʃˣ].