From French crevasse.

• IPA: /kɹəˈvæs/

crevasse (plural crevasses)

1. A crack or fissure in a glacier or snowfield; a chasm.
2. (US) A breach in a canal or river bank.
3. (by extension) Any cleft or fissure.
   • 2010, Scott R. Riley, A Lost Hero Found, page 111:

     I moved my left hand to the small of her back, just above her belt-line and stroked the peach fuzz in her crevasse with my fingers.

4. (figuratively) A discontinuity or “gap” between the accounted variables and an observed outcome.
   • 1954: Gilbert Ryle, Dilemmas: The Tarner Lectures, 1953, dilemma vii: Perception, page 105 (The Syndics of the Cambridge University Press)

     […] he laments that he can find no physiological phenomenon answering to his subject’s winning a race, or losing it. Between his terminal output of energy and his victory or defeat there is a mysterious crevasse. Physiology is baffled.

• French: crevasse
• German: Gletscherspalte
• Italian: crepaccio
• Portuguese: crevasse
• Russian: тре́щина

crevasse (crevasses, present participle crevassing; simple past and past participle crevassed)

1. (intransitive) To form crevasses.
2. (transitive) To fissure with crevasses.