straw vote
— Noun
– English
～ an unofficial vote taken to determine opinion on some issue
swing voter
— Noun
– English
～ a voter who has no allegiance to any political party and whose unpredictable decisions can swing the outcome of an election one way or the other
scrutin uninominal voting system
— Noun
– English
～ based on the principle of having only one member (as of a legislature) selected from each electoral district
stem vowel
— Noun
– English
～ a vowel that ends a stem and precedes an inflection