doggone
UK[ˈdɒɡɒn]US[ˈdɔːɡɔːn]
adj
used to express mild annoyance or emphasis
adv
used for emphasis, especially to express annoyance
Etymology
the word 'doggone' is an american english minced oath from the mid-19th century, serving as a euphemistic alteration of the profane exclamation "god damn." this process of phonetic distortion, known as taboo deformation, was common to avoid blasphemy while retaining the expressive force of the original. the transformation from "god damn" to "doggone" likely passed through intermediate forms like "darn" and involved folk etymology, associating the softened term with the word "dog." thus, its modern usage as a mild expletive of annoyance or for emphasis is entirely derived from its history as a substitute for a stronger oath, not from any literal canine meaning.
Analysis
this is a minced oath, a euphemistic alteration, and is not productively formed from separable morphemes in modern english.
Examples
that doggone cat got into the milk again.
i've been looking for my doggone keys all morning.
well, doggone, i didn't expect to see you here.