NONTRIVIAL Synonyms

• requiring full use of your abilities or resources

• stimulating interest or thought

• disturbingly provocative

• complicated in structure; consisting of interconnected parts

• a conceptual whole made up of complicated and related parts

• a compound described in terms of the central atom to which other atoms are bound or coordinated

• (psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior

• a whole structure (as a building) made up of interconnected or related structures

• difficult to analyze or understand

• difficult to analyze or understand

• requiring more than usually expected or thought due; especially great patience and effort and skill

• not easy; requiring great physical or mental effort to accomplish or comprehend or endure

• hard to control

• extremely impressive in strength or excellence

• inspiring fear

• not easy; requiring great physical or mental effort to accomplish or comprehend or endure

• dispassionate

• resisting weight or pressure

• produced without vibration of the vocal cords

• (of light) transmitted directly from a pointed light source

• (of speech sounds); produced with the back of the tongue raised toward or touching the velum

• with effort or force or vigor

• with firmness

• earnestly or intently

• causing great damage or hardship

• slowly and with difficulty

• indulging excessively

• into a solid condition

• very near or close in space or time

• with pain or distress or bitterness

• to the full extent possible; all the way

• very strong or vigorous

• characterized by effort to the point of exhaustion; especially physical effort

• given to excessive indulgence of bodily appetites especially for intoxicating liquors

• being distilled rather than fermented; having a high alcoholic content

• unfortunate or hard to bear

• dried out

• having many complexly arranged elements; elaborate

• connected by participation or association or use

• entangled or hindered as if e.g. in mire

• emotionally involved

• highly complex or intricate and occasionally devious

• enveloped

• making great mental demands; hard to comprehend or solve or believe

• used of old persons or old trees; covered with knobs or knots

• highly complex or intricate and occasionally devious

• tangled in knots or snarls

• characterized by effort to the point of exhaustion; especially physical effort

• not easily borne; wearing

• characterized by or performed with much energy or force

• taxing to the utmost; testing powers of endurance

• bristling with perplexities

• having or covered with protective barbs or quills or spines or thorns or setae etc.

• not given to gentleness or sentimentality

• physically toughened

• resistant to cutting or chewing

• someone who learned to fight in the streets rather than being formally trained in the sport of boxing

• an aggressive and violent young criminal

• a cruel and brutal fellow

• very difficult; severely testing stamina or resolution

• substantially made or constructed

• violent and lawless

• feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')

• unfortunate or hard to bear

• making great mental demands; hard to comprehend or solve or believe

• not to be trusted

• having concealed difficulty

• marked by skill in deception