Synonyms to penitentially

humbly, abjectly, apologetically, contritely, meekly, modestly, on all fours, on bended knee, penitently, quietly, repentantly, sheepishly, submissively, unassumingly, unobtrusively, unostentatiously, unpresumptuously, unpretendingly, unpretentiously, with bated breath, with due deference, without ceremony, bashfully, blushingly, coyly, demurely, diffidently, guiltily, shamefacedly, shamefastly, shyly, timidly, timorously, with downcast eyes