The Collaborative International Dictionary
Shamefastly
Shamefast \Shame"fast\, a. [AS. scamf[ae]st.] Modest; shamefaced. -- Shame"fast*ly, adv. -- Shame"fast*ness, n. [Archaic] See Shamefaced.
Shamefast she was in maiden shamefastness.
--Chaucer.
[Conscience] is a blushing shamefast spirit.
--Shak.
Modest apparel with shamefastness.
--1 Tim. ii. 9
(Rev. Ver.).
Wiktionary
shamefastly
adv. In a shamefast manner.