BSB
For although they knew God, they neither glorified Him as God nor gave thanks to Him, but they became futile in their thinking and darkened in their foolish hearts.
AKJV
Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
CPDV
For although they had known God, they did not glorify God, nor give thanks. Instead, they became weakened in their thoughts, and their foolish heart was obscured.
ERV
because that, knowing God, they glorified him not as God, neither gave thanks; but became vain in their reasonings, and their senseless heart was darkened.
NHEB
Because, although they knew God, they did not glorify him as God or give him thanks, but their thinking became nonsense, and their foolish heart was darkened.
SMT
Wherefore having known God, not as God did they honour or return thanks; but were rendered vain in their conversations, and their heart without understanding was darkened.