IPA: /ˈweɪv.ləs/
KK: /ˈweɪv.ləs/
Not having any waves; smooth and calm in appearance or texture.
The lake was waveless, reflecting the clear blue sky above.
Waveless → It is formed from "wave" (from Old English "wafian", meaning to move to and fro) and "-less" (meaning without). The word "waveless" means without waves or the absence of movement associated with waves.
Think of the word 'wave' which means to move, and remember that 'waveless' describes a state of being without that movement.