IPA: //ˈraʊsər//
KK: /ˈraʊsər/
A person or thing that wakes someone up or stirs excitement.
The speaker was a real rouser, energizing the crowd with his words.
Rouser → The word 'rouser' originates from the verb 'rouse' (from Old English 'rūsan', meaning to awaken or stir up) combined with the agent suffix '-er' (meaning a person who). A rouser is a person who awakens or stirs up excitement or energy.
Think of someone who 'awakens' or 'stirs up' energy — that's what a 'rouser' does.