durchkämmen

Verb

 * 1) to comb thoroughly
 * 2) to search throughly

Usage notes
When used to mean 'search throughly', this verb may be treated as an inseparable verb, by analogy with other inseparable verbs carrying a similar meaning, such as durchsuchen or durchstreifen.

Etymology 2
From Etymology 1 (sense 2 above). Reanalyzed as an inseparable verb.

Verb

 * 1) to search throughly