assiduous

assiduous
    adj 1: marked by care and persistent effort; "her assiduous
           attempts to learn French"; "assiduous research";
           "sedulous pursuit of legal and moral principles" [syn:
           {assiduous}, {sedulous}]
    

Assiduous \As*sid"u*ous\, a. [L. assiduus, fr. assid?re to sit
   near or close; ad + sed[=e]re to sit. See {Sit}.]
   1. Constant in application or attention; devoted; attentive;
      unremitting.
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            She grows more assiduous in her attendance.
                                                  --Addison.
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   2. Performed with constant diligence or attention;
      unremitting; persistent; as, assiduous labor.
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            To weary him with my assiduous cries. --Milton.
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   Syn: Diligent; attentive; sedulous; unwearied; unintermitted;
        persevering; laborious; indefatigable.
        [1913 Webster] {As*sid"u*ous*ly}, adv. --
        {As*sid"u*ous*ness}, n.
        [1913 Webster]
    

112 Moby Thesaurus words for "assiduous":
      advertent, agog, alert, all ears, all eyes, ardent, attentive,
      aware, careful, concentrated, conscious, constant, continuing,
      diligent, dogged, earnest, elaborate, enduring, energetic,
      faithful, fervent, finical, finicking, finicky, hard, hardworking,
      heedful, immutable, inalterable, indefatigable, indomitable,
      industrious, insistent, intense, intent, intentive, invincible,
      laborious, lasting, loyal, meticulous, mindful, never idle,
      never-tiring, nice, niggling, observant, observing, obstinate,
      on the ball, on the job, open-eared, open-eyed, openmouthed,
      operose, painstaking, patient, patient as Job, permanent,
      perseverant, persevering, persistent, persisting, pertinacious,
      plodding, plugging, preoccupied, rapt, regardful, relentless,
      resolute, sedulous, single-minded, sleepless, slogging, stable,
      steadfast, steady, strenuous, stubborn, tenacious, thorough,
      thoroughgoing, tireless, unabating, unconquerable, undaunted,
      undiscouraged, undrooping, unfailing, unfaltering, unflagging,
      unflinching, unintermitting, uninterrupted, unnodding, unrelaxing,
      unrelenting, unremitting, unsleeping, unsparing, unswerving,
      untiring, unwavering, unwearied, unwearying, unwinking,
      utterly attentive, vehement, watchful, weariless, zealous