Synonyms of firmly

1 Syllable

hard, fast, tight

2 Syllables

flatly, staunchly, stably, stiffly, loyally, strongly, tightly, soundly, solid, truly, harshly, grimly

3 Syllables

robustly, steadily, sturdily, vibrantly, mindfully, rigidly, durably, closely, headstrongly, stubbornly, doggedly, stolidly, thoroughly, steadfastly, mulishly, healthily, gratingly, devoutly, solidly, fixedly

4 Syllables

confirmedly, trustworthily, enduringly, invincibly, unchangeably, severely, inflexibly, motionlessly, unflinchingly, unshakeably, vigorously, immutably, unyieldingly, tenaciously, securely, bullheadedly, intractably, substantially, pigheadedly, resistantly, resolvedly

5 Syllables

unrelentingly, obdurately, resolutely, indomitably, unalterably, obstinately, unwaveringly, positively, pertinaciously, contumaciously, unassailably

6 Syllables

opinionatedly, energetically, unequivocally