PASSIONLESS
emotionless, passionless
(adjective) unmoved by feeling; āhe kept his emotionless objectivity and faith in the cause he servedā; āthis passionless girl was like an icicle in the sunshineā-Margaret Deland
passionless
(adjective) not passionate; āpassionless observation of human natureā
Source: WordNet® 3.1
Etymology
Adjective
passionless (comparative more passionless, superlative most passionless)
Lacking in passion.
Source: Wiktionary
Pas"sion*less, a.
Definition: Void of passion; without anger or emotion; not easily excited;
calm. "Self-contained and passionless." Tennyson.
Source: Webster’s Unabridged Dictionary 1913 Edition