How to Master the ielts

enhanced
to improve something or encourage it
favourite
something you like the most; eg favourite TV show
inadvertently
by mistake
obedience
doing what you are told to do
praise
use words of approval such as ‘well done’, ‘good dog’
retrieve
bring back; fetch
selectively bred
choosing which animals (or plants) should mate to produce 
desirable qualities
socialize
mix with others in a group
stranger
someone who is not known; unfamiliar
stray
to move away/wander away and risk becoming lost
suit
suitable; fits with
suppressed
to hold back or prevent something
track
follow
traditional
the old way, conventional or accepted way (second meaning: customs 
and beliefs from earlier times; part of heritage; eg religious practices such as 
Easter, Christmas, Diwali)
verbally
with speech

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Appendix 
2
British and American spellings
You can use British or American spellings in the IELTS without being penalized
but you should be consistent. For example: flavours and colours 
✓
(British); flavors 
and colors 
✓
(American); flavours and colors 
✗
(British and American). Selected 
spellings are listed below.
British 
American
advertise 
advertize
aluminium 
aluminum
axe 
ax
brunette 
brunet
centre 
center
cheque 
(pay)check
colour 
color
co­operate 
cooperate
defence 
defense
disc 
disk
enrol 
enroll