Siddhi (Devanagari सिद्धि) is a Sanskrit word that can be translated as "perfection", "accomplishment", "attainment", or "success".
In Indian religions the word specifically refers to psychic or occult powers such as clairvoyance, levitation, materialization, etc. In Hinduism there are several descriptions of siddhi-s. The following eight are usually considered the primary ones:
Aṇimā: reducing one's body even to the size of an atom.
Mahima: expanding one's body to an infinitely large size.
Garima: becoming infinitely heavy.
Laghima: becoming almost weightless.
Prāpti: having unrestricted access to all places.
Prākāmya: realizing whatever one desires.
Iṣṭva: possessing absolute lordship.
Vaśtva: the power to subjugate all.