IPA: //sɪˈnɒdɪk//
KK: /sɪˈnɒdɪk/
Relating to the period between two successive conjunctions of celestial bodies, such as the moon and the sun.
The synodic month is the time it takes for the moon to return to the same phase.
Synodic → It is formed from "syn-" (meaning together) and "odikos" (from Greek "hodós", meaning way or path). The term refers to the way or path of celestial bodies as they appear together in the sky during a synodic period.
Think of celestial bodies moving 'together' ('syn-') along a 'path' ('hodós') — that's why synodic relates to their combined appearances.