Forbiddenness

[fer-bid-n, fawr-] /fərˈbɪd n, fɔr-/

verb
1.
a past participle of .
adjective
2.
not allowed; prohibited:
a forbidden food in his religion.
3.
Physics. involving a change in quantum numbers that is not permitted by the selection rules:
forbidden transition.
/fəˈbɪdən/
adjective
1.
not permitted by order or law
2.
(physics) involving a change in quantum numbers that is not permitted by certain rules derived from quantum mechanics, esp rules for changes in the electrical dipole moment of the system

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Forbidden transition
noun 1. (physics) an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
Forbidding
[fer-bid-ing, fawr-] /fərˈbɪd ɪŋ, fɔr-/ adjective 1. grim; unfriendly; hostile; sinister: his forbidding countenance. 2. dangerous; threatening: forbidding clouds; forbidding cliffs. [fer-bid, fawr-] /fərˈbɪd, fɔr-/ verb (used with object), forbade or forbad or forbid, forbidden or forbid, forbidding. 1. to command (a person) not to do something, have something, etc., or not to enter some […]
Forbore
[fawr-bawr, -bohr] /fɔrˈbɔr, -ˈboʊr/ verb 1. simple past tense of 1 . [fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or […]

Forborn
[fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or self-controlled when subject to annoyance or provocation. /fɔːˈbɛə/ verb -bears, -bearing, -bore, […]
Forborne
[fawr-bawrn, -bohrn] /fɔrˈbɔrn, -ˈboʊrn/ verb 1. past participle of 1 . [fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or self-controlled […]