celoso
1. [marido, hermano] jealous (de of)
2. (=ferviente) zealous (en el trabajo) conscientious
3. (=desconfiado) suspicious, distrustful
4. (Latin America) (mechanics) highly sensitive
5. (Andes) [barca] unsteady, easily upset
6. (Latin America) [arma] delicate, liable to go off
·éste es un fusil celoso
·this gun is quite liable to go off