Is it ensure, insure, or assure?
16c. variant of scrycke (c.1200), from Old Norse skrækja "to screech" (see screech), probably of imitative origin. Related: Shrieked; shrieking. The noun is attested from 1580s, from the verb.
A bit or touch; a dose: each a free-associational shpritz of surreal hi-de-ho
[1970s+; fr Yiddish, literally, ''a squirt'']