Miscellaneous vocabulary connected to magic: both "real" magic with spells and also stage magic, the illusionist's craft.

Real magic

Regardless of whether you believe that real magic and proper wizards exist, Klingons have words for such concepts.

Magic is 'IDnar, and a wizard or sorcerer is a 'IDnar pIn'a' (literally, master of magic) or a reSwI' (literally, spellcaster).

A magic spell is a tlheH, and the verb for them is reS cast. It can be used either with an object (tlheH reS 'IDnar pIn'a' the wizard cast a spell) or without (reStaH 'IDnar pIn'a' the wizard is casting spells).

Stage magic

In English, magic can also be used to refer to what an illusionist does during a magic show—pretend to violate the laws of physics through misdirection, sleight of hand, etc. rather than through supernatural powers.

To do so is to mIn yuq outwit the eyes; a stage magician or illusionist can thus be called a mIn yuqwI'.

Another word for a stage magician is 'IDnar lIlwI', literally magic simulator—to lIl is to simulate something or impersonate someone (but without attempt to defraud). 'IDnar lIl (literally, to simulate magic) is another verb for what a stage magician does.

lIlIllI'

A final, humorous note: when Marc Okrand passed on the information about these magic-related words from his Klingon informant, Maltz, he added a post-script saying that "My favorite sentence at the moment is They are (continuously and with some sort of goal in mind) impersonating you (plural). Or in other words: lIlIllI'."