noun
something that needs careful thought; something questionable
Used when a matter requires careful consideration or when its appropriateness is in doubt. Often appears in phrases like 考え物だ.
その計画は本当に考え物だ。
That plan really needs careful thought.
安易に引き受けるのは考え物です。
Accepting it too easily is questionable.
noun
Less common; refers to a brain-teaser or conundrum. Often replaced by パズル or なぞなぞ in modern speech.
この考え物はなかなか解けない。
This puzzle is quite hard to solve.