Reciprocal; Reciprocate [re·cip·ro·cal] adj. Done or performed in return: “Reciprocal respect.”

Frugal; Frugality [fru·gal] adj. Economical with regard to money or food. Simple and plain that costs very little: “A frugal meal.”

Docile [doc·ile] adj. Submissive. Ready to accept control or instruction. “The dog was very docile around children.”

Gravitas [grav·i·tas] n. Dignity, seriousness, or solemnity in manner. “He has the necessary gravitas to lead the company.”

Incendiary [in·cen·di·ar·y] adj. Designed to cause fires. “An incendiary device.”

Dismal [dis·mal] adj Gloomy. Depressing; dreary. “The business was a dismal failure;” “Dismal weather.”

Provenance [prov·e·nance] n. The beginning of something’s existence; something’s origin. The place of origin or earliest known history of something. “An exquisite vase of Chinese provenance.”

Tepid [tep·id] adj. Showing little enthusiasm: “The president had a tepid response to the proposal.”

Efficacious [ef·fi·ca·cious] adj. Successful in producing a desired or intended result; effective. “Efficacious treatment for the disease.”

Incorrigible [in·cor·ri·gi·ble] adj. Not able to be corrected, improved, or reformed. “His bad habits were incorrigible.”