Pronunciation guide: IPA symbols, stress and word endings

θ	thin	ð	this	ʃ	she	ʒ	measure
tʃ	church	dʒ	judge	ŋ	sing	j	yes

p b t d k g f v s z h m n l r w sound as in ordinary English spelling.

ˈ main stress, before the stressed syllable: /ˈwɔːtə/ water · ˌ lighter (secondary) stress: /ˌʌndəˈstænd/ understand
ː a long vowel · (r) an r said only in accents that pronounce it (most American, Scottish, Irish)

-s / -es (plurals; he/she form of verbs): /s/ after voiceless sounds (cats), /z/ after voiced (dogs), /ɪz/ after s, z, sh, ch, j sounds (buses, watches). Spelling: -es after s, x, z, ch, sh; consonant + y → -ies (city → cities).
-ed (past): /t/ after voiceless sounds (walked), /d/ after voiced (played), /ɪd/ after t or d (wanted). Spelling: love → loved, stop → stopped, carry → carried.
-ing: make → making, run → running, see → seeing.
Irregular: go, went, gone · be, was, been · see, saw, seen · man → men · child → children · mouse → mice.
Older (King James) forms: -eth = -s (he loveth = he loves) · -est with “thou” (thou lovest) · spake = spoke.

percuss

UK /pəˈkʌs/ · US /pɚˈkʌs/ verb

Forms percusses percussing percussed

verb (transitive) To strike; to hit; to knock; to give a blow to. “Solid bodies, if they be very softly percussed, give no sound.”
verb (intransitive) To impact. “Falling on the roof of the caravan, the hailstones percussed noisily.”
verb (transitive, chiefly medicine) To attempt to pinpoint the location or other quality of something by tapping on an overlying surface. “The doctor percussed his chest to determine whether he had pneumonia.”

Etymology

From Latin percussus, past participle of percutiō (“to strike, to beat”), from per (“through”) + quatiō (“to shake, to strike”).

verb To strike smartly; to strike upon or against; as, to percuss the chest in medical examination.
verb To strike or tap in an examination by percussion. See Percussion, 3. Quain.

Etymology [L. percussus, p.p. of percutere; per + quatere to shake, strike. See Quash.]

Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “percuss”, CC BY-SA 4.0. Details