すっかり (translations)→ absolutely all already altogether anew awful certainly completely deep deeply dramatically drastically easily every everything exactly extremely fairly finally forever freely full fully genuinely hopelessly indeed late much nicely noticeably perfectly quite rapidly real really ridiculously seriously severly significantly simply so splendidly spoil stone sufficiently superfluous terribly totally unmitigated very well whole
つくづく (translations)→ appreciatively closely death earnestly somehow strongly surely thoroughly utterly
よく (translations)→ again almost always better carefully close common constantly enormously exceedingly frequent frequently further good great hard intimately like lot many mostly occasional often once periodically prolonged properly respectable sometimes soundly usually vigorous