ARDUOUS Synonyms

• characterized by or performed with much energy or force

• taxing to the utmost; testing powers of endurance

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

• not easily borne; wearing

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

• having a debilitating effect

• producing exhaustion

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

• 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

• of comparatively great physical weight or density

• unusually great in degree or quantity or number

• of the military or industry; using (or being) the heaviest and most powerful armaments or weapons or equipment

• marked by great psychological weight; weighted down especially with sadness or troubles or weariness

• of great intensity or power or force

• (physics, chemistry) being or containing an isotope with greater than average atomic mass or weight

• an actor who plays villainous roles

• a serious (or tragic) role in a play

• slowly as if burdened by much weight

• usually describes a large person who is fat but has a large frame to carry it

• (used of soil) compact and fine-grained

• darkened by clouds

• (of an actor or role) being or playing the villain

• permitting little if any light to pass through because of denseness of matter

• of relatively large extent and density

• made of fabric having considerable thickness

• prodigious

• full and loud and deep

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

• of great gravity or crucial import; requiring serious thought

• slow and laborious because of weight

• large and powerful; especially designed for heavy loads or rough work

• dense or inadequately leavened and hence likely to cause distress in the alimentary canal

• sharply inclined

• full of; bearing great weight

• requiring or showing effort

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

• lacking lightness or liveliness

• (of sleep) deep and complete

• in an advanced stage of pregnancy

• not easily borne; wearing

• requiring full use of your abilities or resources

• stimulating interest or thought

• disturbingly provocative

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

• hard to control

• having complicated nutritional requirements; especially growing only in special artificial cultures

• severe and unremitting in making demands

• requiring precise accuracy

• extremely impressive in strength or excellence

• inspiring fear

• rigidly accurate; allowing no deviation from a standard

• demanding strict attention to rules and procedures

• not easily borne; wearing

• 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

• (geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

• the act of having on your person as a covering or adornment

• producing exhaustion

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

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