Etymology
Advertisement
*ko- 

Proto-Indo-European root, the stem of demonstrative pronoun meaning "this."

It forms all or part of: cis-; et cetera; harass; he; hence; her; here; him; his; hither; it.

It is the hypothetical source of/evidence for its existence is provided by:  Greek ekeinos "that person;" Latin cis "on this side," citra (adv.) "on this side;" Old Church Slavonic si, Lithuanian is, Hittite ki "this;" Old English hider, Gothic hidre "hither."

Related entries & more 
Advertisement
scream (n.)

c. 1500, "a sharp, piercing sound or cry," expressive of pain, alarm, etc., from scream (v.).

And (as they say) lamentings heard i' th' Ayre; Strange Schreemes of Death. ["Macbeth," II.iii.61]

That spelling probably reflects "sk-" as spelled in words from Latin (such as school; see sch); his early editions also have schreene for screen. The slang meaning "something very great, excellent, or exciting," especially "something that evokes a cry of laughter" is by 1888; screamer in this sense is from 1831.

Related entries & more