Unit 1
in a way based on reason rather than emotions
accepted; recognized
different
sudden fear
strengthen
homework
of living things
not fixed
stressful; requiring effort and energy
overall
way of spending free time
calculate roughly
regular; usual
first concern
rest
Unit 2
say more than the truth about something
nonstandard vocabulary
make or become suitable
weak; uncertain; unprotected
different; separate
difficult, but in an interesting way
vary within limits
change slightly in order to make