STRAIGHTENING
Verb
straightening
present participle of straighten
Noun
straightening (plural straightenings)
The act of making something straight.
Source: Wiktionary
STRAIGHTEN
Straight"en, v. t. [imp. & p. p. Straighted; p. pr. & vb. n.
Straighting.]
1. To make straight; to reduce from a crooked to a straight form.
2. To make right or correct; to reduce to order; as, to straighten
one's affairs; to straighten an account. To straighten one's face, to
cease laughing or smiling, etc., and compose one's features.
Straight"en, v. t.
Definition: A variant of Straiten. [Obs. or R.]
Source: Webster’s Unabridged Dictionary 1913 Edition