(mathematics, computing) operand

understanding, comprehension / appreciation

(mathematics, computing) A function or other mapping that carries variables defined on a domain into another variable; operator.

(physically) true, straight, unwarped, unskewed, proper / (abstractly) correct, right, true

(uncommon, dialect) factual, true, correct, accurate / (uncommon, dialect) genuine, real / (uncommon, dialect) actual, real, certain

understand, comprehend / appreciate

important, significant

importance, consequence, significance

mathematics (field of study)

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object