Background: Phonetically in some languages, such as Navajo, aspiration of stops tends to be realised as voiceless velar airflow; aspiration of affricates is realised as an extended length of the frication.
Question: In Navajo, the aspiration of affricates can be seen as what?
Answer:<extra_id_0>.
<extra_id_0> an extended length of the frication<extra_id_1>