The Collaborative International Dictionary
Indefinably \In`de*fin"a*bly\, adv. In an indefinable manner.
Wiktionary
adv. In an indefinable manner
Usage examples of "indefinably".
There was that air about him that marked him indefinably as a dragonman.
Every breath she drew in smelled of soap and heat and something indefinably male.
There was an air of quietness about it that often indefinably pervades a house in which there is illness or a tragedy.
The figure had something indefinably familiar about it, but a moment later it was gone, having turned the corner.
There was something indefinably familiar about him, but as his face and figure were so well concealed, I could not tell just why I thought so.
They were cut to Dad’s barrel-shaped frame and would never have fit me, even if they hadn’t been old, worn at cuffs and shoulders, and indefinably old-mannish in their style.
Their readiness to pay was indefinably mingled with a dread of being expected to, and their prodigalities would take flight at the first hint of coercion.