IPA: /trænˈmɪtəl/
KK: /trænˈsmɪtəl/
The action of sending or passing something from one place to another.
The transmittal of the documents was completed on time.
Transmittal → It is formed from "trans-" (meaning across) and "mittere" (meaning to send). The word "transmittal" refers to the act of sending something across a distance or from one place to another.
Think of sending something 'across' ('trans-') — that's what transmittal means.
No commonly confused words.