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.

motorboat

UK /ˈməʊtəˌbəʊt/ · US /ˈmoʊtəˌboʊt/ noun, verb

Forms motorboats motorboating motorboated motor boat

noun (nautical) Any vessel driven by an engine (either inboard or outboard), but especially a small one.
verb To ride in a motorboat.
verb (slang, intransitive, transitive) To press or bury one's face between the breasts of a woman; to press or bury one's face between the breasts of a woman and shake one's head, hum, or vibrate one's lips in imitation of a motorboat engine's sound.
verb (slang, transitive) To press one's face into or between (something else).
verb (slang, transitive) To press or envelope someone else's face into or between one's own breasts; to wrap one's breasts around someone's face or head.

Synonyms

From motor + boat.

Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “motorboat”, CC BY-SA 4.0. Details