Adjective suffixes

1. Noun or verb + suffix
Noun or Verb                  Suffix              Adjectives
danger, fame                     -ous              dangerous, famous (= well-known)
music, politics                   -al                 musical, political
industry, economics          -al                  industrial, economical (= saves you money)
cloud, fog, sun, dirt           -y                 cloudy, foggy, sunny, dirty
attract, create                   -ive               attractive, creative
tolerance, consistence  -ant/-ent          tolerant, consistent, efficient (efficiency)
idealism                          -ic                  idealistic

Note: Sometimes there is a spelling change. Here are common examples:
double the consonant: sun/sunny, fog/foggy
leave out (xoa di) the final "e": create/creative, fame/famous
leave out (xoa di) the final "s" before "al": politics/political, economics/economical
change "y" to "i" before "al"" industry/industrial

2. -ABLE/-IBLE
This suffix is used to form many adjectives from nouns or verbs:
enjoy                      enjoyable
comfort                  comfortable
knowledge             knowledgeable
suit                         suitable
drink                      drinkable
comprehense         comprehensible
rely                        reliable
break                      breakable
inflexi                      inflexible

3. -FUL and -LESS
The suffix -ful often means "full of" + the meaning of the adjective:
careful
helpful
painful (=hurts a lot)
useful
thoughtful (kind and always thinks about others)

The suffix -less means "without" + the meaning of the adjective:
careless
painless
useless (= has no use or function)
thoughtless
jobless
homeless (= with nowhere to live)

Some examples:
_ You must be very careful when you drive in wet weather.
_ It was so foggy this morning that I couldn't see more than twenty metres in front of me.
_ Everyone in my country has heard of her, she's very famous
_ The people in the tourist information office were very helpful/knowledgeable and answered all our questions without any problems.
_ This is a very dangerous road. there were at least three serious accidents on it last year.
_ It was very painful (dau toan bo) when I hit my leg against the corner of the table.
_ We've never had any problems with our TV in ten years, it's been very reliable (dang tin cay).
_ The factory is in the middle of the industrial part of the city, surrounded by other factories.
_ I made some coffee but it was horrible. In fact, my sister said it was undrinkable.
_ I'm afraid my working hours are very inflexiable, I have to start at exactly the same time every day and finish at the same time every day.
_ It seems terrible to me that there are so many homeless people living in a city with thousands of empty houses.