Knock -

"Knock knees" (Genu Valgum) is a condition where knees touch while ankles stay apart.

In engineering, "knock" refers to abnormal combustion or vibrations that can damage engines. "Knock knees" (Genu Valgum) is a condition where

If you are building a product and need to develop a notification system, provides an infrastructure to power all messaging needs, such as transactional emails, in-app notifications, and lifecycle marketing. such as transactional emails