V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
nityaḥ sarvagataḥ sthāṇuracalo'yaṁ sanātanaḥ. — It is uncleavable, it is incombustible, it can neither be drenched nor dried. Eternally stable, immobile, all-pervading, it is for ever and for ever. 2·24
स्थाणुःsthāṇuḥnominative singular of the masculine form of the adjective sthāṇu (stable).