"mound, hill," 1864, from Arabic tall, related to Hebrew tel "mount, hill, heap." Compare Hebrew talul "lofty," Akkadian tillu "woman's breast."
Old English tellan "to reckon, calculate, number, compute; consider, think, esteem, account" (past tense tealde, past participle teald), from Proto-Germanic *taljan "to mention in order" (source also of Old Saxon tellian "tell," Old Norse telja "to count, number; to tell, say," Old Frisian tella "to count; to tell," Middle Dutch and Dutch tellen, Old Saxon talon "to count, reckon," Danish tale "to speak," Old High German zalon, German zählen "to count, reckon"), from PIE root *del- (2) "to count, reckon" (see tale).
Meaning "to narrate, announce, relate" in English is from c. 1000; that of "to make known by speech or writing, announce" is from early 12c. Sense of "to reveal or disclose" is from c. 1400; that of "to act as an informer, to 'peach' " is recorded from 1901. Meaning "to order (someone to do something)" is from 1590s. To tell (someone) off "reprimand" is from 1919.
Original sense in teller and phrase to tell time. For sense evolution, compare French conter "to count," raconter "to recount;" Italian contare, Spanish contar "to count, recount, narrate;" German zählen "to count," erzählen "to recount, narrate." Klein also compares Hebrew saphar "he counted," sipper "he told."
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