fundamental (adjective) fundamental: basic, important
Sinonime: ailing, below par, bilious,
cranky, delicate, diseased, down, dragging,
faint, feeble, in poor health, indisposed, infirm,
lackluster, laid-low,
languid,
low, mean, off-color, out of action, out of shape,
pallid, peaked, peaky, pining, poorly, rocky, run-down, seedy, sickish, unhealthy,
wan, weak
Antonime: fine, healthy,
hearty, well,
wholesome