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.

useless

UK /ˈjuːs.ləs/ · US /ˈjus.ləs/ adjective

Forms uselesser uselessest

adjective Without use or the possibility to be used. “This fork's prongs are bent. It's useless now.”
adjective Unhelpful, not useful; pointless (of an action). “I think it's useless to keep this discussion going. It's like talking to a brick wall.”
adjective (derogatory, of a person) Good-for-nothing; not dependable. “Bill never mows the lawn, takes out the trash or anything. He's useless, but I love him anyways.”
adjective (colloquial, somewhat derogatory) Of a person, Unable to do well at a particular task or endeavor. “My brother is useless at most computer games, but he is an awesome PS2 player.”

Synonyms

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

Sanskrit dictionary entries whose meaning includes “useless” (best matches first).