Paul Ancel, an important poet of the twentieth century, was born in Bukovina, Romania. He wrote under the pseudonym Paul Celan, an anagram of his last name. Unlike his parents, who were deported and killed in Nazi labor camps, Celan was interned by the Nazi for 18 months before he could escape and join the Red Army. Following World War II, Celan wandered between borders when Bukovina was erased from the world map. He was an immigrant in Paris for a while. Although he was freed from the Nazi labor camps in 1944, his spirit never recuperated from the horrendous experiences. Celan's most noted poem Death Fugue exposes his need of healing.
As used in the paragraph above, interned means .............