It is the fear of sitting down

an irrational fear of sitting down. an irrational fear of sitting down.

Bathmophobia- Fear of stairs or steep slopes Climacophobia- Fear of stairs, climbing, or of falling downstairs

Kainolophobia or Kainophobia- Fear of anything new, novelty.

Kakorrhaphiophobia- Fear of failure or defeat.

Katagelophobia- Fear of ridicule.

Kathisophobia- Fear of sitting down.

Kenophobia- Fear of voids or empty spaces.

Keraunophobia or Ceraunophobia- Fear of thunder and lightning.(Astraphobia, Astrapophobia)

Kinetophobia or Kinesophobia- Fear of movement or motion.

Kleptophobia- Fear of stealing.

Koinoniphobia- Fear of rooms.

Kolpophobia- Fear of genitals, particularly female.

Kopophobia- Fear of fatigue.

Koniophobia- Fear of dust. (Amathophobia)

Kosmikophobia- Fear of cosmic phenomenon.

Kymophobia- Fear of waves. (Cymophobia)

Kynophobia- Fear of rabies.

Kyphophobia- Fear of stooping.

Hope I helped.

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