ETYMOLOGY
from speech + -ful
EXAMPLE (for adj. 2.)
“… John Mauropus, of Euchaita, Euchania, Theodoropolis — one living man among many dead, as the Arabian tale goes of the city of enchantment — one speechful voice among the silent, sole survivor of the breath which maketh words effluence of the soul replacing the bittern’s cry — speak to us! …”
From: Some Account of the Greek Christian Poets
By Elizabeth Barrett Browning, 1842 (1863)
Lexicophilia 