shorten become short or shorter; "In winter, the days shorten"
truncate -
replace a corner by a plane
substitute,
interchange,
replace,
exchange put in the place of another; switch seemingly equivalent items; "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"; "synonyms can be interchanged without a changing the context's meaning"
geometry the pure mathematics of points and lines and curves and surfaces
truncate -
approximate by ignoring all terms beyond a chosen one; "truncate a series"
math,
mathematics,
maths a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
Adjective
truncate -
terminating abruptly by having or as if having an end or point cut off; "a truncate leaf"; "truncated volcanic mountains"; "a truncated pyramid"