noun, noun or participle which takes 'suru', intransitive verb
long thought; lengthy consideration; pondering for a long time
Often used in contexts like games (shogi, go), business, or personal decisions where someone takes a long time to think before acting. The する form is intransitive.
See also: 小考
彼は次の一手を長考した。
He thought for a long time about his next move.
重
You need to ponder at length before making an important decision.