UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈkɪdnæpɪŋ/

From the verb kidnap: (⇒ conjugate)
kidnapping is: Click the infinitive to see all available inflections
v pres pverb, present participle: -ing verb used descriptively or to form progressive verb--for example, "a singing bird," "It is singing." (US & UK)

WordReference Random House Learner's Dictionary of American English © 2020
kid•nap /ˈkɪdnæp/USA pronunciation   v. [+ object], -napped or -naped, -nap•ping or -nap•ing. 
  1. to carry off (a person) by force or trickery, esp. for use as a hostage or to get money;
kid•nap•per,  kid•nap•er, n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2020
kid•nap  (kidnap),USA pronunciation v.t.,  -napped  or -naped, -nap•ping  or -nap•ing. 
  1. to steal, carry off, or abduct by force or fraud, esp. for use as a hostage or to extract ransom.
kid′nap•pee, kid′nap•ee, n. 
kidnap•per,  kidnap•er,  n.
  • kid1 + nap, variant of nab 1675–85
    seize, bear off, bear away.

Collins Concise English Dictionary © HarperCollins Publishers::
kidnap /ˈkɪdnæp/ vb ( -naps, -napping, -napped) ( US -naps, -naping, -naped)
  1. (transitive) to carry off and hold (a person), usually for ransom
Etymology: 17th Century: kid1 + obsolete nap to steal; see nab

ˈkidnapper, US ˈkidnaper n
'kidnapping' also found in these entries (note: many are not synonyms or translations):
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