かたくなに (translations)→ adamantly doggedly pious robustly staunchly stoutly tihgtly
ことさら (translations)→ deliberate deliberately determined elaborately extra particularly positively remarkably studied studious very
しつこい (translations)→ heavy perpetual stubborn such tiresome unwanted
しつこく (translations)→ insistently keep naggingly narrowly pester relentless
どうしても (translations)→ absolutely always barely definitely desperately eventually inalterably inescapably inevitably insist invariably irresistible just most mostly must never obviously quite really simply somehow undoubtedly would
どこまでも (translations)→ absolute all emphatically extremely faithfully forever indefinitely perfect persist through
なかなか (translations)→ admirably almost awfully better considerably deeply enough every fairly half hardly highly kind kindly late moderately pretty rather real reasonably reluctantly repeatedly rich some something
一向に (translations)→ bit completely indifferent no still
頑なに (translations)→ adamant passionately
執拗に (translations)→ consistently dog-like endlessly insistent obstinately persistent relentlessly steadily tenaciously
必死に (translations)→ anxiously carefully desperate great intent spirited