English

Noun

insisture ‎(plural insistures)

1. (obsolete) A dwelling or standing on something; fixedness; persistence.
   • William Shakespeare, Trolius and Cressida, act I, scene 3

     The heaven themselves, the planets and this centre
     Observe degree, priority, and place,
     Insisture, course, proportion, season, form,
     Office, and custom, in all line of order […]

References

• insisture at OneLook Dictionary Search