retreatist
/rɪˈtriːtɪst/noun
1An advocate or supporter of a policy of (typically military) retreat.
2 Sociology. A person who is subject to or governed by retreatism.
adjective
1Characterized by the advocacy of (typically military) retreat; of the nature of a retreatist.
2 Sociology. Characterized or influenced by retreatism; characteristic of a retreatist.
Origin
1920s. From retreat + -ist. Compare retreatism.