Expressions (phrases, clauses, etc.), I-adjective (keiyoushi)
unable to leave the work at hand; right in the middle of something; tied up; busy
Idiomatic expression
今仕事から手が離せない。I can't get away from work now.
Also written 手が放せない【てがはなせない】、手がはなせない【てがはなせない】