a black viscous mixture of hydrocarbons used for road surfacing and roofing

to work one's heart out; to exert the utmost effort, typically in intellectual or creative endeavors

(onom.) sound of light rain, snow, or falling leaves; patter

lit. to open one's liver and drip gall (idiom); wholehearted loyalty

pitchblende (uranium ore)

to drip (of rainwater)

to drain

to state one's humble opinion (idiom)

to be completely honest and sincere; to lay bare one's heart