/ ˌɪntəˈspɜːs; NAmE -tərˈspɜːrs/ verb
[ vn ] to put sth in sth else or among or between other things :
Lectures will be interspersed with practical demonstrations.
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WORD ORIGIN
mid 16th cent. (in the sense diversify (something) by introducing other things at intervals ): from Latin interspers- scattered between, from interspergere , from inter- between + spargere scatter.