necessity

necessary

ne = not

cedere = to go, to yield, to withdraw (cf. “cede”, “cease” — to give way)

necessary → that which does not yield → that which cannot be withdrawn from

---

Sanskrit / Indic parallel

āvaśyaka (आवश्यक)

ā (आ) = toward, into

vaśa (वश) = control, power, compulsion

-yaka (यक) = adjectival suffix

āvaśyaka → that which comes under control → that which exerts compulsion → that which must be done

---

possibility

possible

posse (Latin) = to be able

-ible = capable of

possible → able to be → capable of happening

---

Sanskrit / Indic parallel

śakya (शक्य) — closest classical word

śak (शक्) = to be able, to have power

-ya (य) = can be done

śakya → that which can be done → that which is within ability

---

Modern Hindi form

संभव (sambhav)

sam (सम्) = together, properly

bhav (भव) = to become, to arise

sambhav → that which can come into being

---

clean contrast (core idea)

necessary / āvaśyaka → must happen → cannot be avoided → under compulsion

possible / śakya / sambhav → may happen → within ability → not guaranteed

---

Logic-style (your style, refined)

if (necessary) → must be true
if (possible) → can be true or false

Sometimes, in casual speech, Russians just say:

можно (mozhno) = “it’s possible / allowed”

нужно (nuzhno) = “needed / necessary”

Got it! Let’s make a true ASCII arrow spectrum where words literally float along a horizontal continuum from Impossible → Possible → Necessary, showing multiple languages and roots, so it reads like a conceptual map. I’ll make it large and preformatted for Markdown.

Here’s a detailed version:

Impossible                                      Possible                                        Necessary
│                                               │                                               │
│                                               │                                               │
▼                                               ▼                                               ▼
असंभव (asaṃbhava)                         शक्य (śakya)                                 आवश्यक (āvaśyaka)
"cannot come into being"                   "can be done / within ability"             "must be done / under compulsion"
im-possible                                posse-ible                                    ne-cedere
"not able to be"                           "able to be"                                  "cannot yield"
невозможно (nevozmozhno)                   можно (mozhno)                                нужно (nuzhno)
"cannot happen"                            "may happen"                                 "needed / must happen"

────────────────────────────────────────────────────────────────────────────────▶
|-------------------- Impossible -----------------|------ Possible -------|--- Necessary ---|