Your sentence
No+lo+sé.
Words in this sentence
él
he, him, masculine personal third person subject and disjunctive pronoun (used as a subject and after prepositions); it, masculine non-personal third-person subject and disjunctive pronoun (usually used after prepositions to refer to masculine nouns)
Pronoun
saber
to know, to understand (a fact); to know how to do something; to find out, to learn; to taste (i.e. have a flavour); to realize, to know (i.e. recognize); to tell, to know (i.e. to discern or distinguish if something is the case); to figure out; to hear from; to hear of, to hear about; to learn, to find out, to know; …
Verb