igrate_ and _immigrate_.= _Emigrate_ means _to go out from a
country_; _immigrate_ means _to enter into a country_. The same
man may be an _emigrant_ when he leaves Europe, and an
_immigrant_ when he enters America.

=_Healthy_ and _healthful_.= _Healthy_ means _having health_;
_healthful_ means _giving health_. "Milk is healthful." "The
climate of Colorado is healthful." "The boy is healthy."

=_Hanged_ and _hung_.= _Hanged_ is the correct past tense of
_hang_ in the sense _put to death, hanged on the gallows_;
_hung_ is the correct past tense for the general meaning
_suspended_.

=_Hygienic_ and _sanitary_.= Both words mean _pertaining to
health_. _Hygienic_ is used when the condition is a matter of
personal habits or rules; _sanitary_ is used when the condition
is a matter of surroundings (water supply, food supply, sewage
disposal, etc.) or the relations of numbers of people.

=_Instants_ and _instance_.= _Instants_ means _small portions of
time_; _instance_ means _an example_.

=_Later_ and _latter_.= _Later_ means _more late_; _latter_ means
_the second in a series of two_. "The latter" is used in
conjunction with the phrase "the former."

=_Lead_ and _led_.= _Led_ is the past tense of the verb _to
lead_. _Lead_ is the present tense.

=_Learn_ and _teach_.= _Learn_ means _to get knowledge of_;
_teach_ means _to give knowledge of_ or _to_. "The instructor
_teaches_ (not _learns_) me physics." "He learns his lessons
easily."

=_Leave_ and _let_.= _Leave_ means _to abandon_; _let_ means _to
permit_.

=_Less_ and _fewer_.= _Less_ refers to quantity; _fewer_ refers
to number. "He has _fewer_ (not _less_) horses than he needs."

=_Liable_, _likely_, and _apt_.= _Likely_ merely predicts;
_liable_ conveys the additional idea of harm or responsibility.
_Apt_ applies usually to persons, in the sense of _having
natural capability_, and sometimes to things, in the sense of
_fitting_, _appropriate_. "It is likely to be a pleasant day."
"I fear it is liable to rain." "He is liable for damages." "He
is an apt lad at his books." "That is an apt phrase."

=_Lie_ and _lay_.= _Lay_, a transitive verb, means _to cause to
lie_. "I lay the book on the table and it lies there." "Now I
lay me down to sleep." A source of confusi