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.

boarder

UK /ˈbɔːdə/ · US /ˈbɔɹdɚ/ noun

Forms boarders

noun A pupil who lives at school during term time. “The student body consisted primarily of boarders, except for a few children belonging to the school staff.”
noun Someone who pays for meals and lodging in a house rather than a hotel. “When I left for college, my parents took on a boarder in my old room to help defray expenses.”
noun One who boards a vehicle.
noun (nautical) A sailor attacking an enemy ship by boarding her, or one repelling such attempts by an enemy. “The captain shouted at the crew to grab arms and repel boarders.”
noun Someone who takes part in a boardsport, such as surfing or snowboarding. “A group of boarders swept past us as we climbed the side of the ski run.”

Synonyms

noun One who has food statedly at another's table, or meals and lodgings in his house, for pay, or compensation of any kind.
noun One who boards a ship; one selected to board an enemy's ship.

Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “boarder”, CC BY-SA 4.0. Details