RUINOUS Copy link • RUINOUSDilapidated, ruinosus; pronus in ruinam (ready to fall): vitiosus (injured, damaged): dilabens (falling to pieces). To be in a ruinous condition, ruinosum esse, ruinam minari (to be on the point of falling): labare (to totter). The house is in a ruinous condition, aedes vitium fecerunt. Destructive, pernicious, perniciosus: exitiosus: exitialis: exitiabilis: damnosus: funestus: pestilens: pestifer. SYN. in HURTFUL.