ACER/ACR meaing "sharp" or "sour." Grapefruit and limes have an acid taste; acid can also describle a person's sense of humor (other words for it might be sharp or biting). The acidity of the soil often indicates whether it's good for growing certain crops.


acerbic [ə-ˈsər-bik]
acrid [ˈa-krəd]
acrimony [ˈa-krə-ˌmō-nē]
exacerbate [ig-ˈza-sər-ˌbāt]

STRICT meaing "to draw tight, bind, or tie." So the English word strict means "tightly controlled." And when someone begin a sentence "Strictly speaking,..." you know he or she is going to be talking about a word or idea in its most limited sense, "drawing tight" the meaning till it's as narrow as possible.


stricture [ˈstrik-chər]
restrictive [ri-ˈstrik-tiv]
constrict [kən-ˈstrikt]
vasoconstrictor [ˌvā-zō-kən-ˈstrik-tər]

STRU/STRUCT meaning "to put together, build, arrange." A structure is something that's been constructed,--that is, built or put together. Instructions tells how the pieces should be arranged. Something that obstructs is a barrier that's been "built" to stand in your way. And something destructive "unbuilds."


deconstruction [ˌdē-kən-ˈstrək-shən]
infrastructure [ˈin-frə-ˌstrək-chər]
construe [kən-ˈstrü]
instrumental [ˌin(t)-strə-ˈmen-tᵊl]

PROP/PROPRI meaning "own." A proprietor is an owner, and property is what he or she owns.


proprietary [prə-ˈprī-ə-ˌter-ē]
propriety [prə-ˈprī-ə-tē]
appropriate [ə-ˈprō-prē-ət]
expropriate [ek-ˈsprō-prē-ˌāt]

TORT meaning "to twist, wind, or wrench." In torture, parts of the body may be wrenched or twisted or stretched; so those "Indian sunborns" that schoolkids give by twisting in different directions on some unlucky guy's wrist stay pretty close to torture's original meaning.


tort [ˈtȯrt]
extort [ik-ˈstȯrt]
contort [kən-ˈtȯrt]
tortuous [ˈtȯrch-wəs]

VIV meaning "to live or be alive." A survivor has lived through something terrible. A revival brings something back to life, whether it's an old film, interest in a long-dead novelist, or religious enthusiam in a group, may be in a huge tent in the countryside.


vivacious [və-ˈvā-shəs]
bon vivant [ˌbän-vē-ˈvänt]
revivify [rē-ˈvi-və-ˌfī]
vivisection [ˌvi-və-ˈsek-shən]

SERV means "to be subject to." A servant is the person who serves you with meals and provides other necessary services.


serviceable [ˈsər-və-sə-bəl]
servile [ˈsər-vəl]
servitude [ˈsər-və-ˌtüd]
subservient [səb-ˈsər-vē-ənt]

CLUS meaning "to close." Words based on the Latin verb often have forms in which the d becomes an s. So, for example, include, which once meant "to shut up or enclose" and now means "to contain," has the releated word inclusive, which means "including everything."


occlusion [ə-ˈklü-zhən]
exclusive [ik-ˈsklü-siv]
recluse [ˈre-ˌklüs]
seclusion [si-ˈklü-zhən]

Greek and Latin Borrowings


acme [ˈak-mē]
catharsis [kə-ˈthär-səs]
colossus [kə-ˈlä-səs]
detritus [di-ˈtrī-təs]
hoi polloi [ˌhȯi-pə-ˈlȯi]
kudos [ˈkü-ˌdäs]
onus [ˈō-nəs]
stigma [ˈstig-mə]