- 必然性 bìránxìng inevitabilitythe quality of being certain to happen or bound to occur; necessity; certainty
- 必然王国 bìránwángguó realm of necessity(philosophy) A state where people are driven by blind forces or natural laws they do not yet understand, contrasted with the [[自由王国|自由王國|zi4 you2 wang2 guo2]].
- 必然之势 bìránzhīshì inevitable trenda natural or certain tendency; a course of events that is bound to happen
- 势所必然 shìsuǒbìrán inevitableinevitably; as a matter of course; a situation where the trend of development is bound to happen
- 必然结果 bìránjiéguǒ inevitable outcomeinevitable outcome; inescapable consequence; certain result
- 必然论 bìránlùn determinismthe philosophical doctrine that all events, including human action, are ultimately determined by causes regarded as external to the will