grammar – n. the study of words and their uses and relations in sentences
ex- prefix meaning former
introduce – v. to lead to or present
sum up – phrasal verb to describe or show the most important parts or qualities of (someone or something) in a brief or simple way
medieval – adj. of or relating to Europe's Middle Ages
practice – v. to work at repeatedly so as to become skilled
devotion – n. a feeling of strong love or loyalty
virtue – n. morally good behavior
sincerity – n. having or showing true feelings that are expressed in an honest way
disconcerting – adj. unnerving or troubling; concerning