threshold [thresh-ohld, thresh-hohld]
1. the sill of a doorway.
2. the entrance to a house or building.
3. any place or point of entering or beginning: the threshold of a new career.
4. Also called limen. Psychology, Physiology. the point at which a stimulus is of sufficient intensity to begin to produce an effect: the threshold of consciousness; a low threshold of pain.
See more synonyms on Thesaurus.com
Origin: before 900; Middle English threschold, Old English threscold, threscwald; cognate with Old Norse threskǫldr, dialectal Swedish träskvald; akin to thresh in old sense “trample, tread”; -old, -wald unexplained
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.