deeply laid plan; careful deliberation
Refers to a plan or scheme that has been carefully thought out, often with a nuance of strategic depth. More common in written or formal contexts.
I was amazed by his deeply laid plan.
深謀遠慮の末に決断を下した。
After careful deliberation, he made his decision.
far sight and deep design; foresight and careful planning
Compound of 深 (deep) and 謀 (plan, scheme). The exact historical derivation is uncertain, but the meaning is transparent from its components.