(n) a long narrow opening

(n) a long narrow depression in a surface

(s) represented or appearing as such; pretended; "His ostensible purpose was charity, his real goal popularity"

(s) appearing as such but not necessarily so; "for all his apparent wealth he had no money to pay the rent"; "the committee investigated some apparent discrepancies"; "the ostensible truth of their theories"; "his seeming honesty"

(n) an abject coward

(s) lacking even the rudiments of courage; abjectly fearful; "the craven fellow turned and ran"; "a craven proposal to raise the white flag"; "this recreant knight"- Spenser

(n) an indication that something has been present; "there wasn't a trace of evidence for the claim"; "a tincture of condescension"

(n) the metal bob of a plumb line

(v) adjust with a plumb line so as to make vertical

(v) examine thoroughly and in great depth

(v) measure the depth of something

(v) weight with lead

(s) exactly vertical; "the tower of Pisa is far out of plumb"

(r) completely; used as intensifiers; "clean forgot the appointment"; "I'm plumb (or plum) tuckered out"

(r) exactly; "fell plumb in the middle of the puddle"

(r) conforming to the direction of a plumb line

(s) reluctant to draw attention to yourself

(s) cool and formal in manner

(s) temperamentally disinclined to talk