Sentence:  Two years before, under the <WSD>swamp-gum</WSD> in their Mosman garden, away from the children's ears, they had talked of separating, but the discussion itself, conducted around mugs of coffee in those green and secure surroundings, had scared them out of it. 
Meaning of the word marked with <WSD> tags:  Any of various species of "Eucalyptus" found in Australia.