tell (v.) Look up tell at Dictionary.com
O.E. tellan "to reckon, calculate, consider, account," from P.Gmc. *taljanan "to mention in order" (cf. O.S. tellian, O.N. telja, O.Fris. tella "to count, tell," Du. tellen "to count, reckon," O.S. talon "to count, reckon," Dan. tale "to speak," O.H.G. zalon, Ger. zählen "to count, reckon"), from base *talo (see tale). Meaning "to narrate, relate" is from c.1000; that of "to make known by speech or writing, announce" is from c.1122. 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 1599. Original sense in teller and phrase to tell time. For sense evolution, cf. Fr. conter "to count," raconter "to recount;" It. contare, Sp. contar "to count, recount, narrate;" Ger. zählen "to count," erzählen "to recount, narrate."
"I tolde hyme so, & euer he seyde nay." [Thomas Hoccleve, "The Regiment of Princes," c.1412]
Telling "having effect or force" is from 1852.
tell (n.) Look up tell at Dictionary.com
"mound, hill," 1864, from Arabic tall, related to Heb. tel "mount, hill, heap."