LEO:
to squelch - zermahlen, zermalmen, durch Morast quatschen
to squash - quetschen, zerdrücken, zerquetschen, jmdn./etw. verdrücken (Dialekt; = zerdrücken)
to quash - ablehnen, unterdrücken, vernichten, verwerfen
to quash a judg(e)ment / verdict - ein Urteil aufheben
Pons-Collins:
squelch - ... 2: (vt) ... b: (inf) (speculation, protest) unterdrücken
squash - ... 2: (vt) ... b: (fig) (inf: = silence) (person) über den Mund fahren (+dat); (= quash) (protest, argument, proposal) vom Tisch fegen (inf); (hopes) vernichten;
I felt completely squashed - ich kam mir ganz klein und hässlich vor (inf)
quash - a: (Jur) (verdict) aufheben, annullieren b: (rebellion) unterdrücken; (suggestion, objection) ablehnen
Oxford-Duden:
squelch - 1: (v.t) a: (stamp on) stampfen; b: (silence) zum Schweigen bringen
squash - 1: (v.t.) ... c: (put down) niederschlagen <Aufstand>; zunichte machen <Hoffnung, Traum>; d: (coll.: dismiss) ablehnen <Vorschlag, Plan>; e: (coll.: silence) zum Schweigen bringen
quash - a: (annul, make void) aufheben <Urteil, Entscheidung>; zurückweisen <Einspruch, Klage>; b: (suppress, crush) unterdrücken <Opposition>; niederschlagen <Aufstand, Generalstreik>
NOAD:
squelch - ... (informal) forcefully silence or suppress: 'property developers tried to squelch public protest.'
squash - ... suppress, stifle, or subdue (a feeling, conjecture, or action): 'the mournful sound did nothing to squash her high spirits.' firmly reject (an idea or suggestion): 'the proposal was immediately squashed by the Historical Society.'
quash - reject as invalid, esp. by legal procedure: 'his conviction was quashed on appeal.' put an end to; suppress: 'a hospital executive quashed rumors that nursing staff will lose jobs.'
M-W:
squelch - 1a: to fall or stamp on so as to crush b(1): to completely suppress: QUELL (2): SILENCE
squash - ... 2: PUT DOWN, SUPPRESS <squash a revolt>
¹quash - to suppress or extinguish summarily and completely
²quash - to nullify especially by judicial action
AHD:
squelch - 1. To crush by or as if by trampling; squash. 2. To put down or silence, as with a crushing retort: 'squelch a rumor.' 3. To suppress or inhibit: 'a protein that squelches gene transcription.'
squash - 1. To beat, squeeze, or press into a pulp or a flattened mass; crush. See synonyms at 'crush.' 2. To put down or suppress; quash: 'squash a revolt.' 3. To silence or fluster, as with crushing words: 'squash a heckler.'
quash¹ - To set aside or annul, especially by judicial action.
quash² - To put down or suppress forcibly and completely: 'quash a rebellion.'
Random House unabridged:
squelch - 1. to strike or press with crushing force; crush down; squash. 2. (Informal.) to put down, suppress, or silence as with a crushing argument or retort, emotional or psychological pressure, etc.
squash - ... 2. to suppress or put down; quash. 3. (Informal.) to silence or disconcert (someone), as with a crushing retort, emotional or psychological pressure, or the like.
quash¹ - to put down or suppress completely; quell; subdue: 'to quash a rebellion.'
quash² - to make void, annul, or set aside (a law, indictment, decision, etc.)
