Even though they knew God, they did not honor him as God or give him thanks, but they became futile in their speculations and their foolish hearts were (eskotisthē | ἐσκοτίσθη | aor pass ind 3 sg) darkened (eskotisthē | ἐσκοτίσθη | aor pass ind 3 sg).
Reference
Romans 1:21
Sequence
3