Adverb
to a severe or serious degree
in a serious manner
Source: WordNetThe saints aren't made from other material, they're humans just like us. In this they differ: they took seriously the question of their salvation. Seraphim of Sarov
Do not take life too seriously. You will never get out of it alive. Elbert Hubbard
Life is far too important a thing ever to talk seriously about. Oscar Wilde
Don't take seriously the cat who mourns for a mouse. Japanese Proverb
A fine rain still soaks you to the bone, but no one takes it seriously. Corsican Proverb
Listen to that which is openly and seriously spoken. Latin Proverb