thwarter
— Noun
– English
~ someone who systematically obstructs some action that others want to take
thwarting
— Noun
– English
~ an act of hindering someone's plans or efforts
thwarting
— Adjective
– English
~ preventing realization or attainment of a desire
thwartwise
— Adjective
– English
~ extending or lying across; in a crosswise direction; at right angles to the long axis; "cross members should be all steel"; "from the transverse hall the stairway ascends gracefully"; "transversal vibrations"; "transverse colon"