(adj): vs. frivolous) -- (concerned with work or important matters rather than play or trivialities
(adj): earnest
(adj): vs. insincere) -- (open and genuine; not deceitful
(adj): not distracted by anything unrelated to the goal
(adj): vs. purposeless) -- (serving as or indicating the existence of a purpose or goal
(n): something of value given by one person to another to bind a contract
(n): property that your creditor can claim in case you default on your obligation
