a relentless and persistent series of challenges, difficulties, or obstacles, typically experienced over a prolonged period of time
the attribute of color that distinguishes one color from another based on its position in the color spectrum or wheel
(physics) a unit of force in the centimeter-gram-second system of units, equal to the force that would give a mass of one gram an acceleration of one centimeter per second squared
words, phrases, and expressions used by a specific group or profession, which are incomprehensible to others
a system of beliefs, principles, or teachings that are formally taught, advocated, or followed
a thin oval board that a painter uses to mix colors and hold pigments on, with a hole for the thumb to go through
a strong and unusual attachment or obsession with a particular object, idea, or activity
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