Anagrams of: INVESTIGATIONAL

• an inquiry into unfamiliar or questionable activities

• the work of inquiring into something thoroughly and systematically

• An event, especially a tournament, that is restricted to invited participants

• pertaining to or characteristic of an invitation

• arousing to action or rebellion

• sheathe

• fold inwards

• watch over (students taking an exam, to prevent cheating)

• expose to cool or cold air so as to cool or freshen

• expose to the circulation of fresh air so as to retard spoilage

• circulate through and freshen

• give expression or utterance to

• furnish with an opening to allow air to circulate or gas to escape