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.

senseless

/ˈsɛnsləs/ adjective

Forms senselesse

adjective Without feeling or desire to work; deprived of sensation. “The blow to his head rendered him senseless; he didn’t awaken until he was in the ambulance.”
adjective Lacking meaning or purpose; without common sense. “What a senseless waste of money.”
adjective Without a discernible meaning or purpose, especially of a violent or evil act. “The school shooting was a senseless act of violence.”
adjective Without consideration, awareness or sound judgement “He took senseless risks, not even aware of the danger he was in.”

Synonyms

From sense + -less. Compare Saterland Frisian sinloos (“senseless, foolish”).

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

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

निःसञ्ज्ञ niḥ-sañjña senseless, insensible, unconscious.
मूर्छत् mūrchat becoming senseless, fainting, swooning.
विचेतन vi-cetana senseless, unconscious, lifeless, inanimate, dead.
निर्बुद्धि nir-buddhi senseless, witless, unwise, ignorant, stupid, out of one's wits.
विचेतस् vi-cetas senseless, mindless, ignorant, stupid; sad, perplexed, unhappy; wise (Vedic).
सम्मूर्छित sam-mūrchita coagulated, congealed, thickened; stupefied, senseless, unconscious; intensified, increased.
आतम् ā-tam -tāmyati, -tamitum, to faint, to swoon, to become senseless; to despond, to languish, fade away.
अचेतन a-cetana or a-cetas, ās, ās, as, destitute of consciousness, inanimate; (of men) inconscious, insensible, senseless, …