A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

Note: 
Neither expression correlates in meaning with the phrase
impatient for something
— eager for smth. to happen; eager to
do or obtain smth.: Koizumi himself acknowledged after polls
closed that people were impatient for change.
impose on someone • impose oneself on someone
impose on someone —obtain a favor from a person, especially
by using persuasion or undue pressure: Could I impose on
you for a little help with this translation?
impose oneself on someone —inconvenience smb. by one’s
presence: As there was no train, he was forced to impose him-
self on his hosts for longer than he had intended.
improve in something • improve on something
improve in something —become better with regard to some
standard or quality: The boy seems to have improved in his
behavior since he had that last warning.
improve on something —produce smth. of a better standard
or quality than before: She improved on her previous per-
formance by swimming the distance in less than a minute.
in a bad way • in the worst way
in a bad way —
1
. in trouble; having serious problems: The
basic exporting industries of Great Britain — coal, metallurgy
and textiles — have been in a bad way. 2. (of health) in a bad
or critical state: But one of the poor men who were hurt at
the fire is dead, and another is, I fear, in a bad way. 3. (coll.)
desire smth. greatly: It’s Friday morning and I’m wanting in a
bad way to stand hip deep in the chilly current of a fast moving
river. 4. fail or be defeated miserably: He has found himself
dragged down by the Party and defeated in a bad way in a
General Election.
in the worst way —
1
. = in a bad way 3: I then wanted in the
worst way to build a sail boat and sail around the world. 2. =
in a bad way 4: To try a major novel about the last war in
Europe without a sense of the past is to fail in the worst way.