Etymologizing the longest words in the English Dictionary

1.Pneumonoultramicroscopicsilicovolcanoconiosis - The lungs disease caused by inhaling very fine ash and sand dust, etymologically derived from the Greek words pneuma, referring to breath and lungs, plus ultramicroscopics, meaning “beyond microscopy.”

2.Hippopotomonstrosesquippedaliophobia - The fear of long words, etymologically derived from the Greek root words hippopotamos (horse) and monstrum (monster) plus sesquippedalio, meaning “foot and a half.”

3.Supercalifragilisticexpialidocious - A made-up word used by Mary Poppins that has come to mean “excellent” or “extraordinary,” etymologically derived from the Latin words super, meaning “above,” calix, meaning “cup,” fragilis, meaning “brittle,” and docios, meaning “teaching.”

4.Pseudopseudohypoparathyroidism - A rare genetic disorder in which there is resistance to the parathyroid hormone, etymologically derived from the Greek pseudos (false) and hypo (under).

5.Floccinaucinihilipilification - The act of estimating something to be of little or no value, etymologically derived from the Latin words flocci (a little bit) plus nauci (nothing) plus nihil (nothing) plus pilus (a hair).

6. Honorificabilitudinitatibus is an old Latin word which means "the state of being able to achieve honor or distinction". It was originally coined by the Roman poet, Horace, in his Satires (Book I, Satire IX, line 860). The word is derived from the Latin honōre (‘honor’) + -ficābilis (‘making, giving’) + -itūdinis (‘state’) + -ātus (‘being’) + -ibus (‘plural’).

7. Thyroparathyroidectomized is a medical term that means “the removal of the thyroid and parathyroid glands”. The word is derived from the Greek thyreos (‘shield-shaped’), para (‘beside’), thyr(e)us (‘door-shaped’), and ektomé (‘cut out’).

8. Dichlorodifluoromethane (CCl2F2) is a man-made, colorless, odorless, non-toxic gas used as a refrigerant and aerosol propellant.

Etymological Definition: Dichlorodifluoromethane is derived from the Greek words "di" (two), "chloros" (greenish yellow), "difluoro" (two fluorine atoms), and "methane" (a type of hydrocarbon).

9. Incomprehensibilities (Longest word in common usage)

Definition: Something that cannot be understood or is beyond understanding.

Etymology: The word "incomprehensibilities" is derived from the Late Latin word incomprehensibilitas, which combines the Latin words incomprehensibilis (not to be grasped) and -itas (quality or state).