fixedly

rigidly securely solidly soundly strongly thoroughly tightly

hard

durably enduringly fast inflexibly like a rock motionlessly solid stably steadily stiffly substantially tight unflinchingly unshakeably

changeably flexibly indefinitely movably waveringly weakly

attentively closely keenly

hard searchingly sharply steadily watchfully

distractedly

mulishly obdurately

bullheadedly contumaciously determinedly doggedly firmly headstrongly indomitably inflexibly intractably opinionatedly persistently pertinaciously pigheadedly recalcitrantly resistantly resolutely resolvedly staunchly steadfastly stolidly tenaciously unamenably unflinchingly unimpressibly unreasonably unreasoningly unrelentingly unwaveringly unyieldingly willfully

docilely graciously obediently

regularly

immovably undeviatingly unwaveringly

absolutely assuredly certainly clearly definitely evidently indeed inevitably inexorably plainly undoubtedly unquestionably

admittedly beyond doubt beyond shadow of doubt come what may conclusively decidedly distinctly doubtlessly explicitly for certain indubitably infallibly irrefutably manifestly nothing else but positively rain or shine to be sure unequivocally unerringly unfailingly unmistakably unshakably with certainty without fail

doubtfully dubiously indefinite indefinitely questionably vaguely

uncertain

immutably unassailably

constantly firmly rigidly