The word swastika is derived from the Sanskrit word svastika, meaning any lucky or auspicious object, and in particular a mark made on persons and things to denote good luck. It is composed of su- meaning "good, well" and asti "to be" svasti thus means "well-being." The suffix -ka either forms a diminutive or intensifies the verbal meaning, and svastika might thus be translated literally as "that which is associated with well-being," corresponding to "lucky charm" or "thing that is auspicious."[1] The word in this sense is first used in the Harivamsa.[2] As noted by Monier-Williams in his Sanskrit-English dictionary, according to Alexander Cunningham, its shape represents a monogram formed by interlacing of the letters of the auspicious words su-astí (svasti) written in Ashokan characters.[3]

The Sanskrit term has been in use in English since 1871, replacing gammadion (from Greek γαμμάδιον). Alternative historical English spellings of the Sanskrit word include suastika, swastica and svastica.