Learn Spanish (Latin America): Esa costumbre les resulta incomprensible. - That custom seems incomprehensible to them.

Esa costumbre les resulta incomprensible.

That custom seems incomprehensible to them.

Breakdown of Esa costumbre les resulta incomprensible.

the custom / the habit (tradition, usual practice)

resultar

to turn out / to seem (as a result)

Questions & Answers about Esa costumbre les resulta incomprensible.

Why use resultar here instead of parecer?

While both can mean "to seem," resultar adds a nuance of discovery, experience, or outcome. It implies that after observing the custom, they came to the conclusion that it is incomprehensible. It acts as a subjective evaluation where something "proves to be" a certain way to someone.

Why is the pronoun les used here instead of ellos?

This sentence uses a structure similar to the verb gustar. The people experiencing the impression are the indirect object (les meaning "to them"), and the thing causing it is the subject (esa costumbre). To use ellos, you would have to change the structure completely to something like es incomprensible para ellos.

Why doesn't incomprensible have an "s" at the end since les is plural?

Because the adjective incomprensible describes the subject of the sentence, which is the singular noun costumbre. Even though multiple people (les) are confused by it, there is only one custom being evaluated. If the subject were plural, like esas costumbres, the adjective would become incomprensibles.

What makes resultar a "pseudo-copulative" verb in this context?