निष्ठाहीन मतलब [वि.] - किसी के भी प्रति निष्ठा न रखने वाला; श्रद्धाहीन; अविश्वासी। Also see Nishthahin in English.
Here is meaning of Nishthahin in hindi. Get definition and hindi meaning of Nishthahin. What is Hindi definition and meaning of Nishthahin ? (hindi matlab - arth kya hai?).