This is the 969th most frequent Polish word.
składać
"Składać" means "to fold," "to submit," or "to assemble," depending on the context.
In this sentence, 'składać' is used in the context of arranging clothing items neatly by folding them.
Składam ubrania po praniu.
I am folding clothes after laundry.
In this case, 'składać' is used to mean expressing or giving, often in formal or ceremonial contexts.
Składam Ci najlepsze życzenia z okazji urodzin.
I extend my best wishes to you on your birthday.
Here, 'składać' implies the act of providing one's signature, metaphorically 'folding' it onto a document.