IPA: /ˌsɪn.ɑːrˈθroʊ.daɪ.əl/
KK: /sɪˌnɑrθrəˈdaɪəl/
Relating to a type of joint in the body that does not allow any movement between the bones.
The skull bones are connected by synarthrodial joints, which do not permit any movement.
Synarthrodial → It is formed from "syn-" (meaning together) and "arthron" (meaning joint) and the suffix "-dial" (related to). The term describes a type of joint that is immovable, where the bones are closely connected together.
Think of 'together' ('syn-') and 'joint' ('arthron') to remember that 'synarthrodial' refers to joints that are connected closely and do not move.