arduous

  1. taxing to the utmost; testing powers of endurance

    Synonyms : straining, strenuous
    Examples :
    • your willingness after these six arduous days to remain here
  2. characterized by effort to the point of exhaustion; especially physical effort

    Synonyms : backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome
    Examples :
    • worked their arduous way up the mining valley
  3. difficult to accomplish; demanding considerable mental effort and skill

    Examples :
    • the arduous work of preparing a Dictionary

abut

  1. lie adjacent to another or share a boundary

    Synonyms : adjoin, border, butt, butt against, butt on, edge, march
    Type Of : adjoin, contact, meet, touch

adumbrate

  1. describe roughly or briefly or give the main points or summary of

    Synonyms : outline, sketch
    Type Of : depict, describe, draw
  2. give to understand

    Synonyms : insinuate, intimate
    Type Of : hint, suggest

abrasion

  1. erosion by friction

    Synonyms : attrition, corrasion, detrition
    Type Of : eroding, eating away, wearing away, erosion, wearing
  2. an abraded area where the skin is torn or worn off

    Synonyms : excoriation, scrape, scratch
    Type Of : wound, lesion
  3. the wearing down of rock particles by friction due to water or wind or ice

    Synonyms : attrition, detrition, grinding
    Type Of : friction, rubbing

atavism

  1. a reappearance of an earlier characteristic

    Synonyms : reversion, throwback
    Type Of : recurrence, return

arbitrator

  1. someone chosen to judge and decide a disputed issue

    Synonyms : arbiter, umpire
    Type Of : evaluator, judge
    Examples :
    • the arbitrator's authority derived from the consent of the disputants

analogue

  1. something having the property of being analogous to something else

    Synonyms : analog, parallel
    Type Of : similarity
  2. of a circuit or device having an output that is proportional to the input

    Synonyms : analog, linear
    Antonyms : digital
    Examples :
    • analogue device

aberration

  1. an optical phenomenon resulting from the failure of a lens or mirror to produce a good image

    Synonyms : distortion, optical aberration
    Type Of : optical phenomenon
  2. a state or condition markedly different from the norm

    Synonyms : aberrance, aberrancy, deviance
    Type Of : abnormalcy, abnormality
  3. a disorder in one's mental state

    Type Of : mental disorder, folie, psychological disorder, mental disturbance, disturbance

armada

  1. a large fleet

    Type Of : fleet

apprehension

  1. fearful expectation or anticipation

    Synonyms : apprehensiveness, dread
    Type Of : fearfulness, fear, fright
    Examples :
    • the student looked around the examination room with apprehension
  2. painful expectation

    Synonyms : misgiving
    Type Of : prospect, expectation, outlook
  3. the act of apprehending (especially apprehending a criminal)

    Synonyms : arrest, catch, collar, pinch, taking into custody
    Type Of : capture, gaining control, seizure
  4. the cognitive condition of someone who understands

    Synonyms : discernment, savvy, understanding
    Type Of : knowing