ellos importaban

they cared about, they were important to

→ importar
import matter; import + aban 3rd-person plural imperfect (indicative or subjunctive)
verb · third plural · imperfect indicative Rare #46,085
they cared about, they were important to Imperfect tense (past habitual/ongoing).
SP: Cuando eran niños, no les importaban las notas.
EN: When they were kids, they didn’t care about grades.
Conjugation of importar
Indicative imperfect
SingularPlural
First importaba —
Third importaba importaban
Subjunctive imperfect
SingularPlural
First importaba —
Third importaba importaban

Los países no importaban.

Countries didn't matter.

— El paciente inglés (1996)

Pero al gobierno de los ricos no le importaban nuestros problemas.

But the government of the rich didn't care about our problems.

— Ciudad de Dios (2002)

Sólo le importaban la tradición y la lealtad.

He only cared about tradition and loyalty.

— Bullet Train (2022)

Tus estudiantes importaban más.

Your students mattered more.

— Masaan (2015)