かもしれない is a combination of the interrogative particle か (questioning), the inclusive particle も (“even”), and the verb 知(しる) (“to know”) modified to the negative potential non-past 知(しれ)れない (“cannot be known”). Together, it means “cannot even be known whether”, which can be condensed to the word “might”.

Examples of 〜かもしれない

See Also

• Presuming with だろう and でしょう