peri                    in Persian mythology, one of a race descended
                        from fallen angels, represented as beautiful
                        and graceful.
hebetate                to dull or blunt, often figuratively.  also v.i., adj.
abulia                  (psychiat.) a lack of volition.
cacoe"thes              an irresistible urge.
nona                    lethargic encephalitis.
velleity                a wish without any effort to obtain its end.
sciamachy               fighting a shadow.
ullage                  the amount by which a container fails to be
                        full; the volume remaining in a container
                        which has been partly emptied; (rocketry) the
                        space left in a propellant tank for expansion,
                        offgassing, etc.
tare                    the weight of a container or conveyance; to
                        account for this in the gross weight.
agio                    allowance made for the differing values of currencies.
tret                    allowance for wastage.