complication

1 something that makes a situation more complicated or difficult the food allergies of the guests were just another complication for the couple trying to plan their wedding reception Synonyms complexity, complicacy, convolution, difficulty, intricacy Related Words aftereffect, ramification, side effect (also side reaction); subtlety, technicality; annoyance, bitch, bother, headache, inconvenience, matter, trouble Phrases fly in the ointment

2 an abnormal state that disrupts a plant's or animal's normal bodily functioning complications set in after the surgery Synonyms affection, ail, ailment, bug, complaint, disease, condition, disorder, distemper, distemperature, fever, ill, illness, infirmity, malady, sickness, troubleRelated Words contagion, contagious disease; contagium, infection; attack, bout, fit, spell; debility, decrepitude, feebleness, frailness, lameness, sickliness, unhealthiness, unsoundness, unwellness, weakness; malaise, matter, pip; epidemic, pest, pestilence, plagueNear Antonyms fitness, healthiness, heartiness, robustness, soundness, wholeness, wholesomeness; fettle, shapeAntonyms health, wellness

3 the state or quality of having many interrelated parts or aspects a problem of such irreducible complication as to defy any easy solution Synonyms complexness, complicacy, complicatedness, complexity, elaborateness, intricacy, intricateness, involution, knottiness, sophisticationRelated Words diversity, heterogeneity, heterogeneousness, multifariousness; impenetrability, incomprehensibility, inexplicabilityNear Antonyms simplification; homogeneity, uniformityAntonyms plainness, simpleness, simplicity