Vocabulary and Synonyms

Resentful is a correct synonym for sullen, as sullen means bad-tempered, sulky, or silently resentful. Affable (A) means friendly - the opposite. Derail (B) means to throw off course. Castigate (D) means to criticize severely.

Echo is the correct synonym for reverberation, as both refer to sound reflecting or continuing to be heard. Fertile (B) means capable of producing vegetation. Albeit (C) is a conjunction meaning 'although'. Stain (D) means to mark or discolor.

A vial is a small container, typically made of glass, used for holding liquids. While 'glass' is close, 'container' is the broader and more accurate synonym as vials can be made of other materials too.

Synthetic means artificial or man-made, not occurring naturally. It refers to materials created through chemical synthesis rather than derived from natural sources.

A mandoline is a musical instrument - specifically a stringed instrument similar to a lute, with strings and a rounded body. The word refers to the instrument, not other meanings.

Propitious means favorable, auspicious, or likely to lead to success. It describes circumstances or timing that are advantageous or promising.

Maternal means relating to or characteristic of a mother, or motherly. It describes qualities typically associated with motherhood - caring, nurturing, protective.

A tuber is the thickened underground part of a stem or root, like a potato. It's a type of root vegetable that stores nutrients for the plant.

A mantle is a cloak, cape, or loose sleeveless garment. It can also refer to a covering or layer, but in the context of clothing, it means cloak.

A garret is an attic, typically a small, cramped, or poorly furnished room on the top floor of a house. It's essentially an attic space, often used for living quarters.

Solitude means the state or situation of being alone, or aloneness. It refers to being by oneself, whether by choice or circumstance.

Sterile can mean unproductive or barren, especially when referring to soil that cannot support plant growth. It also means free from bacteria or other microorganisms, but in this context, unproductive is the intended synonym.

Carious means decayed, especially when referring to teeth affected by tooth decay or cavities. It describes the process of deterioration, particularly in dental contexts.

Withered means shrivelled, shrunken, or dried out. It typically describes plants or plant parts that have lost moisture and vitality, becoming dry and contracted.