hypno-, hypn-

(Greek: sleep)

ahypnia (s), ahypnias (pl) (nouns)
A state of profound insomnia or the inability to sleep or incapable of sleeping for very long.
ahypnosis (s), ahypnoses (pl) (nouns)
A state of profound insomnia or the inability to sleep; sleeplessness.
anhypnia (s), anhypnias (pl) (nouns)
Another term for insomnia or the inability to sleepl.
antihypnotic, anhypnotic (s); antihypnotics, anhypnotics (pl) (nouns)
Tending to prevent sleep; such as, a medicine, etc. that is used for this purpose.
archehypnotic
Occurring at the beginning of sleep.
autohypnosis
1. The act or process of hypnotizing oneself.
2. A self-induced hypnotic state, often employed as a way to enhance the suggestions given the subject by the therapist; self-hypnosis and idiohypnotism.
3. The intelligent use of self-hypnosis offers much to the individual in whom increased efficiency in concentration, relaxation, self-control, and learning capacity is important. —Duncan A. Holbert, M.D.
autohypnotic
dehypnotize
To awaken out of the hypnotic state.
dyshypnia
1. A sleeping disorder.
2. Difficult or restless sleep.
euhypnia
A condition of restful and easy sleep.
hyperhypnosis
A pathological state of prolonged sleep, from which the patient can be roused only partly and very briefly; hypersomnia, lethargy.
hypnagogia
Denoting a transitional state, related to the hypnoidal, preceding sleep; applied also to various hallucinations that may manifest themselves at that time.
hypnagogic, hypnogogic
1. Sleep-producing; hypnotic.
2. Preceding sleep: a reference to images or dreams that are perceived during the transition between the waking state and sleep.
hypnagogue
1. A hypnotic agent that induces sleep.
2. An agent causing sleepiness or drowsiness.
hypnalgia
Pain occurring during sleep; also known as “dream pain”.
Also see the mesmerism page for additional enlightenment.

Related "sleep" units: dorm-; letho-; narco-; oneiro- (dream); somni-; sopor-.