He leaned back in his chair.
leaning
/ˈlē-niŋ/
noun
a definite but not decisive attraction or tendency —often used in plural
leaning propensity proclivity penchant mean a strong instinct or liking for something. leaning suggests a liking or attraction not strong enough to be decisive or uncontrollable. propensity implies a deeply ingrained and usually irresistible inclination.
verb
to incline, deviate, or bend from a vertical position
to cast one's weight to one side for support
to rely for support or inspiration
Lean on me as we walk.
verb
to make lean