In English, there are many words which look similar, but they are different in meaning:
PERISHABLE / PERISHING
Perishable: liable to die quickly.
e.g. Fresh vegetables are perishable; put them in the refrigerator.
Perishing: causing suffering.
e.g. Negative thinking may cause perishing emotions and thoughts.
SEDATIVE / SEDENTARY
Sedative: calming or soothing.
e.g. The doctor gave her some sedative medicine to put her to sleep..
Sedentary: accustomed to sitting; physically inactive.
e.g His sedentary work -- sitting in front of the computer -- took a toll on his health.
e.g. Avoid a sedentary lifestyle even if you are approaching 60.
GENTEEL / GENTLE
Genteel: well-bred, polite; imitating the lifestyle of the rich.
e.g. Your friend is genteel. Is he very rich?
e.g. All along he has been living in genteel poverty. He is not practical.
Gentle: kind, friendly, mild.
e.g. Be gentle to my puppy.
DISPOSABLE / INDISPOSED
Disposable: cant be removed or got rid of.
e.g. This machine is disposable; we can do without it
Indisposed: not feeling well; unwilling to
e.g. You look indisposed. Is there something wrong with you?
e.g. Many people are indisposed to working on weekends.
WANDER / WONDER
Wander means to walk aimlessly; wonder means to consider or question some issue.
e.g. The hiker lost his direction and wandered in the forest for some hours.
e.g. I wondered if he would come to the birthday party.
PROVIDING THAT / PROVIDED THAT
Providing that is incorrect.
e.g. You can go out to play provided (that) you have finished your home work.
e.g. You can keep the book for another week providing that no one has reserved it (incorrect: provided that should be used instead).
TERMINABLE / TERMINAL
Terminable: can be ended.
e.g. Your employment is only temporary and terminable at any time.
Terminal: at the end.
e.g. The doctor told him that he had terminal cancer.
DECORATIVE / DECOROUS
Decorative: having an artistic or showy effect.
e.g. The ballroom with all the ribbons and flowers are very decorative.
Decorous: showing good taste.
e.g. The Princess looks decorous in that simple but beautiful dress.
Copyright© 2018 by Stephen Lau