speculation
🇺🇸
/ˌspekjuˈleɪʃn/
🇬🇧
/ˌspekjuˈleɪʃn/
guessing about something without knowing all the facts
There was much speculation about why he left his job suddenly.
关于他突然离职的原因有很多猜测。
buying and selling things hoping to make money, but risking loss
Stock market speculation can lead to big gains or big losses.
股市投机可能导致巨大收益或巨大损失。