motto
nounUK /ˈmɒtəʊ/
US /ˈmɑːtoʊ/
A motto is a short sentence that tells what someone believes or tries to do.
Our school motto is "Work hard and be kind."
OTHER MEANINGS
2. A short phrase printed on a coat of arms or badge.
The knight's shield carried the motto "Brave and True."
3. A guiding principle that a person lives by.
Her motto in life is to always help others.
4. A phrase used in advertising to sell a product.
The company's motto is "Just do it."