unleavenedness

The story

1. Proto-Indo-European*né
2. Proto-Indo-European*n̥-
3. Proto-Germanic*un-
4. Proto-West Germanic*un-
5. Old Englishun-
6. Middle Englishun-
7. Englishun-
8. Proto-Indo-European*h₁lengʷʰ-
9. Proto-Indo-European*h₁léngʰus
10. Proto-Italic*breɣʷisinflu.
11. Proto-Italic*leɣʷis
12. Latinlevis
13. Latinlevō
14. Vulgar Latin*levāmen
15. Old Frenchlevain
16. Middle Englishlevayn
17. Englishleaven
18. Englishleavened
19. Englishunleavened
20. English todayunleavenedness

From unleavened (“not being raised with a leaven or raising agent; (figurative) unaffected by something, unmoderated, unrelieved”) + -ness (suffix attached to adjectives forming abstract nouns with the sense ‘the quality or state of being [the adjective]’). Sense 1.2 (“condition or quality of being unaffected by something”) refers to a leaven such as yeast permeating through a dough and causing it to rise. Specifically, sense 1.2.2 (“condition or quality or being unaffected by sin”) refers to leaven being used in the Bible as a metaphor for sin affecting a person. See, for example, 1 Corinthians 5:6–8 (King James Version; spelling modernized): “[K]now ye not that a little leaven leaveneth the whole lump? Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our Passover is sacrificed for us. Therefore let us keep the Feast, not with old leaven, neither with the leaven of malice and wickedness: but with the unleavened bread of sincerity and truth.”