Haptodysphoria: a shiveringly unpleasant feeling experienced from touching certain surfaces, such as peaches or wool [Gk. háptō (“touch”; “hasten”) + -dus (“bad”) + –phérō (“I bear”; “carry”)]

Harpocratic: relating to silence (OU)?

Hartal: a general strike of labour, including a total shutdown of workplaces, businesses, courts, etc, as a political protest [Hindi haṛtāl, from hāṭ (“shop”) + -tālā (“lock”)]

Hebesphalmology: study of juvenile delinquency [OU; from Hebe (“goddess of youth and spring”(?)) + ? + -logy]

Henotic: promoting harmony or peace; unifying [Gk. henōtikós, (“serving to unite”)] ☮️

Hesternopotia: a pathological yearning for the good old days (OU)

Heteronym: a word with the same spelling but a different pronunciation and meaning [Gk. héteros (“other”; “another”) + -nym]

Heterotopia: strange or ambivalent places (places that defy the normal logic of ordering) [word popularised by philosopher Michel Foucault, Fr. hétérotopie, Gk. héteros + -topia from “utopia”, (“place”)]

Horrisonant: having an ugly, harsh sound; unpleasant to the ear [L. horrēre, sonānt-em (“to dread”; “shudder”) + -ant]

Humicubation: the act or practice of lying on the ground, esp in penitence or self-abasement [L. humus (“the ground”) + –cubare (“to lie down”)]

Hygeiolatry: fanaticism about health; the worship of health and/or hygiene [ Gk. hygie (“healthy”) + –latry (“worship”)]

Hygrophanous: seeming transparent when wet, and opaque when dry [Gk. hygr- (“wet”) + –phan, -phen (“to show”; “visible”)(?) + -ous]

Hyperhedonia: (Medic.) a condition where abnormally heightened pleasure is derived from participation in any act or happening (no matter how mundane) [Gk. hyper- + G. hēdonē, (“pleasure”)]

Hypertrichosis: excessive hairiness [Gk. hyper-, (“excess”) + -trikhos, (“hair”) and –osis]

Hypobulia: (the procrastinator’s curse!) (Psych.) a lack of willpower or decisiveness [Gk. hypo (“beneath“ or “below,”) + -aboulía (“irresolution”)]

Hypogeal: pertaining to the earth’s interior; subterranean; growing or existing underground [Gk. hupógeios (“underground”)] (cf. Hypogeum: underground temple, tomb or cavern)

Hypothimia: profound melancholy or mental prostration; depressive state of mind; diminished emotional response [Gk.  hypo- + Greek -thymos (“spirit”)]

Key: OU = origin unknown

Idioglossia: secret speech or language, especially invented by children [Gk. idio- (“own”; “peculiarity”) + -glōssa, (“tongue”; “speech”)]

Idolum: insubstantial image; a spectre or phantom; a fallacy [Gk. eídōlon, (“image; “idol”), from eîdos, (“form”)]

Illuminati: those who claim to have exceptional intellectual or spiritual awareness (orig. a Bavarian secret society founded in 1776) [L. illuminatus (“enlightened”)]

Indocible: unteachable [in- + LateLat. -docibilis (“docible” (“teachable”)]

Ineluctable: unable to be resisted or avoided; inescapable [L. in- + –ēlūctor (“struggle out”) + -bilis]

Interciliary: between the eyebrows [L. inter- (“between“; “amid”) + –cilium (“eyelid”)]

Inexpugnable: that which cannot be taken by assault or storm; unconquerable; impregnable [L. in + -expugnābilis]

Innascible: not subject to birth; without a beginning; self-existent [L. innāscibilitās (“state of being unable to be born”)]

Invultuation: the use of or the act of making images of people, animals, etc, for witchcraft; sticking pins in a wax doll representing someone you wish to inflict pain on [MedLat. invultuāre (“to make a likeness”) from in- + vultus (“likeness”)]

Irrefragable: not able to be refuted or disproved; irrefutable; indisputable; unbreakable [LateLat. irrefragabilis, from L. refragari (“to oppose or resist”)]

Isographer: someone who imitates another person’s hand-writing [Gk. iso- (“same”) + –graphe (“write”)]