1. 猜测：guesstimate 瞎猜 | guesswork 猜测 | guidance 辅导

2. 推测;猜测：guesstimated tubing expansion 预计的油管伸长 | guesswork 推测;猜测 | guest element 痕量元素

3. guesswork

3. 臆测：guesstimate 依推测的估计 | guesswork 臆测 | guest of honor 主宾

4. 凭猜测所作之工作：guesstimateguestimate 依推测的估计 | guesswork 凭猜测所作之工作 | guest 客人

1. 猜测；推测
    Guesswork is the process of trying to guess or estimate something without knowing all the facts or information.

guesswork的反义词

    e.g. The question of who planted the bomb remains a matter of guesswork.
           到底是谁安放了炸弹依然只是猜测。

1. an estimate based on little or no information

    Synonym: guessguessingshotdead reckoning