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.

number one

adjective, noun, proper noun

Forms number ones

adjective (idiomatic) First; foremost; best, often used after its headword. “Commuting to work is the number one reason to own a car.”
adjective (US, law enforcement, slang) Black, African-American.
noun The most important person, the one who is in charge.
noun Someone who is top of a ranking, who is ranked first.
noun Oneself, being considered foremost, as by an egoist.
noun (childish, euphemistic) Urine; urination.
noun (music) The single that has sold the most in a given period.
noun (soccer) The main goalkeeper of a team, so-called because they wear the number 1 on the back of their kit.
noun (cricket) The batsman who opens the batting.
noun A first lieutenant.
proper noun A locality in the MidCoast council area, eastern New South Wales, Australia.

Synonyms

Piecewise doublet of numero uno.

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