Learn how to say Sternly correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word stern:
(of a person or their manner) serious and unrelenting, especially in the assertion of authority and exercise of discipline:
a smile transformed his stern face
Mama looked stern
(of an act or statement) strict and severe:
stern measures to restrict vehicle growth
(of competition or opposition) putting someone or something under extreme pressure:
the past year has been a stern test of the ability of British industry
be made of sterner stuff
have a stronger character and be more able to overcome problems than others:
whereas James was deeply wounded by the failure, George was made of sterner stuff
[from Shakespeare’s Julius Caesar ( iii. 2. 93)]
the sterner sex
archaic men regarded in contrast to women.
Old English styrne, probably from the West Germanic base of the verb stare