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abbrev.
conger eel
abyss
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clods
serenoa
undulate
acer saccharum
rising
air strike
abdominous
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1st class
1st class
/fɜrst klæs/
noun
Mail that includes letters and postcards and packages sealed against inspection
(
1st class
,
1st-class mail
,
first class
,
first-class mail
)
mail that includes letters and postcards and packages sealed against inspection
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