As a native English speaker; pellucid was new to me.
replyFusillades specifically was unfamiliar but I inferred if from context and knowing fusilier.
Pram is common in British English. I'm guessing you learned US English, which doesn't use it.
replyYes, as slang for ‘perambulator’, which is basically ‘stroller’
replyThough even in the UK I think it has a slightly old fashioned feel -- I feel like parents are more likely to have a pushchair than a pram.
replyThe word pram doesn't exist in American English, true, but you'll learn it anyway if you ever read Peter Pan.
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