Synonyms

Caveat means a warning, caution, or proviso - a qualification or explanation meant to prevent misinterpretation. 'Warning' is a direct and accurate synonym, especially in legal or formal contexts. The other options (sluggish - slow, dense - thick or stupid, insult - offensive remark) are unrelated to caution or warnings.

Pinioned literally means having wings tied (from falconry), but figuratively means confined, restrained, restricted, or held back. 'Confined' accurately captures this meaning of being restricted or unable to move freely. The word originates from the practice of pinioning birds' wings to prevent flight.

Agog means eager, excited, or in a state of eager anticipation and curiosity. 'Excited' is a direct synonym capturing this sense of eager interest, enthusiasm, and anticipation. The word suggests being keenly interested or expectant, often about seeing or hearing something.

Torrid means extremely hot, scorching, or burning - intensely hot, whether literally (temperature) or figuratively (passionate intensity). 'Scorching' is a direct synonym meaning intensely hot or burning. The other options (skiff - a small boat, keen - sharp or eager, wisdom - knowledge) are unrelated to heat or temperature.

Changeable or unstable

Dumbfounded or horrified or frightened by something terrible

Forsake means to abandon, give up, or leave behind something or someone. It implies a deliberate decision to cease support or association. The other options are unrelated: forgive means to pardon, ape means to copy, and cringe means to recoil in embarrassment.

Weaken, drooping, fatigued, weary 

Germane means appropriate.

Gratuitous means something that is unwarranted, unneeded, or lacking good reason. It often describes actions that are uncalled for or done without justification. The options thankful, reproachful, and satisfactory are unrelated to this meaning.

A gastronome is a person who enjoys food and is knowledgeable about fine dining, cuisine, and culinary arts. The term derives from Greek words relating to stomach and laws/rules. The other options are unrelated: stomach distress describes a condition, fortune telling is predicting the future, and study of minerals is mineralogy.

Guise means an external appearance, cover, or mask - something that conceals the true nature. Appearance is the closest synonym among the options, as guise refers to how something appears outwardly.

Grotesque means comically or unpleasantly distorted, strange, or bizarre in appearance or form. It describes something that is oddly or weirdly distorted. The other options are incorrect: vulgar means obscene or lacking sophistication, hilarious means extremely funny, and ordinary means normal or common.

Gustatory relates to the sense of taste or the sense organs involved in tasting. It comes from the Latin word for taste. The other options are incorrect: fitful means intermittent or irregular, loathsome means disgusting or repulsive, and pertaning to wind currents relates to a different sense entirely.