/ˈeɪkɔːrn/

acorn

BrE /ˈeɪkɔːn/

NAmE /ˈeɪkɔːrn/

the small brown nut of the oak tree, that grows in a base shaped like a cup

great/tall ˌoaks from little acorns ˈgrow

(saying)

something large and successful often begins in a very small way