Etymology
Advertisement
congenital (adj.)
Origin and meaning of congenital

"existing from birth," 1796, from Latin congenitus "born or produced together," from assimilated form of com "together, with" (see con-) + genitus, past participle of gignere "to beget" (from PIE root *gene- "give birth, beget"). This sense formerly belonged to congenial (which is attested from 1660s with this meaning). Related: Congenitally.

Related entries & more 
Advertisement
defect (v.)
Origin and meaning of defect

1570s, "to hurt, damage;" 1580s, "fail become deficient" (senses now obsolete); 1590s, "to desert, revolt," from Latin defectus, past participle of deficere "to fail, desert," from de "down, away" (see de-) + combining form of facere "to do, make" (from PIE root *dhe- "to set, put"). Related: Defected; defecting.

Related entries & more 
defect (n.)
Origin and meaning of defect

early 15c., "want or lack of anything," especially lack of something essential to perfection or completeness, from Old French defect and directly from Latin defectus "failure, revolt, falling away," noun use of past participle of deficere "to fail, desert," from de "down, away" (see de-) + combining form of facere "to do, make" (from PIE root *dhe- "to set, put").

Related entries & more 
malnutrition (n.)

"defect of sustenance from imperfect assimilation of food," 1843, from mal- + nutrition.

Related entries & more 
ichthyosis (n.)

congenital disease of the epidermis, 1815, coined in Modern Latin (1801); see ichthyo- + -osis. So called for the hard dry scales and plates which form on the skin. 

Related entries & more 
Advertisement
blemish (n.)
"a defect, flaw, imperfection," 1520s, from blemish (v.).
Related entries & more 
failing (n.)
late 14c., "failure;" 1580s, "defect, fault," verbal noun from fail (v.).
Related entries & more 
birth-mark (n.)
also birthmark, "congenital mark or blemish," by 1805, from birth (n.) + mark (n.1). Birth marks in 17c. could be longing marks; supposedly they showed the image of something longed for by the mother while expecting. Related: Birthmarked.
Related entries & more 
moon-calf (n.)

also mooncalf, "abortive, shapeless, fleshy mass," 1560s, attributed to the influence of the moon; from moon (n.) + calf (n.1). In later 16c., "deformed creature, monster;" from 1620s as "congenital idiot."

Related entries & more 
flaw (v.)
"cause a flaw or defect in," early 15c. (implied in flawed); see flaw (n.). Related: Flawing.
Related entries & more