-십시요: what does this ending mean??

Question

Answer

I agree with Mila.^^'
The ending "-(으)십시오(not 십시요)" is the honorific form of "-(으)세요", and often used in written.

e.g.
Please learn Korean. (to learn = 배우다)
= 한국어를 배우+세요.(polite, informal)
= 한국어를 배우+십시오.(polite, formal)

Please sit down. (to sit down = 앉다)
= 앉+으세요.
= 앉+으십시오.

\^o^/

Answer

Please.