solitude

n.独居；孤独

solicitation, solicitor, Solicitor-General, solicitous, solicitously, solicitude, solid, solid-state, solidarity, solidification, solidify, solidity, solidly, soliloquize, soliloquise, soliloquy, solipsism, solitaire, solitarily, solitary, solitary confinement, solo, soloist, solstice, solubility, soluble, solution, solution to, solvable, solve, solvency, solvent, solver, somatic, somber, sombre (US somber), sombrely, sombreness, sombrero, some, somebody,