"Crude" means made in a rudimentary or makeshift way.

"Execrable" means detestable or very bad.

"Abundant" means a lot; Diminutive means small; Famished means starving or without food; Dehydrated means without water or thirsty; and Implacable means cannot be be satsifed.

If something is "antiquated," it is old-fashioned or out of date.

The 200 year old house’s antiquated heating system still used coal as its fuel source.

So "outdated" is the best answer.

"Disarming" can mean charming, persuasive, or beguiling and often describes someone's smile or demeanor. "Unwitting," on the other hand, means unaware. Don't confuse "disarming" with weapons and choose "aggressive" or "hazardous." "Imminent" means forthcoming or impending.

"Ecumenical" and "catholic" both mean all-encompassing, universal. (Don't confuse catholic with "Catholic," a specific religious denomination.) "Germane" is an antonym for "irrelevant." "Exuberant" means overjoyed, while "tyrannical" means authoritarian and cruel.

"Tantamount" is an adjective that means "equal in seriousness to; virtually the same as," so we need to pick out another word that means "equal." While "indifferent" may look like a good answer choice because it looks like "in-" ("not") and "different," "indifferent" actually doesn't mean "not different," but instead means "having no particular interest or sympathy; unconcerned," or "neither good nor bad; mediocre," so it's not the word we're looking for. "Equivalent," however, means "equal in value, amount, function, or meaning," and because it is the answer choice closest in meaning to "tantamount," it is the correct answer.

“Insipid” is used to describe something unexciting. For clarification, "intrepid" means adventurous; "mournful" means full of sadness after a loss; "derisive" means disdainful or contemptuous.

"Tantamount" means equal to.

The term, “algid,” is used to describe an episode experienced during a fever where the individual feels cold and clammy. The best answer is “feverish and cold.” For clarification, "amiable" means friendly; "timid" means shy; "serene" means peaceful.