Table of Contents POS
HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS
ROGET THESAURUS

WORDNET DICTIONARY

Verb yammer has 2 senses

• yammer(v = verb.communication) howl, wrawl, yowl - cry loudly, as of animals; "The coyotes were howling in the desert"
is one way to emit, let loose, let out, utter
Sample sentences:
You can hear animals yammer in the meadows
The meadows yammer with animals

• yammer(v = verb.communication) grizzle, whine, yawp - complain whiningly; Array
is one way to complain, kick, kvetch, plain, quetch, sound off
Sample sentences:
Somebody ----s
Somebody ----s that CLAUSE

OXFORD DICTIONARY

THESAURUS

yammer

babble, bark, battle cry, bawl, bellow, call, caterwaul, chat, chatter, cheer, clack, creak, cry, gab, gabble, hail, halloo, holler, hollo, hoot, howl, hurrah, jaw, keen, pipe, prattle, pule, rallying cry, roar, screak, scream, screech, shout, shriek, shrill, skirl, skreigh, squall, squawk, squeak, squeal, ululate, ululation, wail, war cry, war whoop, whimper, whine, whistle, whoop, wrawl, yak, yap, yawl, yawp, yell, yelp, yo-ho, yowl

ROGET THESAURUS

yammer

Lamentation

VB lament, mourn, deplore, grieve, weep over, bewail, bemoan, condole with, fret, wear mourning, go into mourning, put on mourning, wear the willow, wear sackcloth and ashes, infandum renovare dolorem, give sorrow words, sigh, give a sigh, heave, fetch a sigh, waft a sigh from Indus to the pole, sigh 'like a furnace', wail, cry, weep, sob, greet, blubber, pipe, snivel, bibber, whimper, pule, pipe one's eye, drop tears, shed tears, drop a tear, shed a tear, melt into tears, burst into tears, fondre en larmes, cry oneself blind, cry one's eyes out, yammer, scream, mew, groan, moan, whine, roar, roar like a bull, bellow like a bull, cry out lustily, rend the air, frown, scowl, make a wry face, gnash one's teeth, wring one's hands, tear one's hair, beat one's breast, roll on the ground, burst with grief, complain, murmur, mutter, grumble, growl, clamor, make a fuss about, croak, grunt, maunder, deprecate, cry out before one is hurt, complain without cause.

For further exploring for "yammer" in Webster Dictionary Online