sincere

a.诚恳的，真诚的

simple interest, simple machine, simple-minded, simpleton, simplicity, simplification, simplify, simplistic, simply, simul-taneously, simulacrum, simulate, simulated, simulation, simulator, simultaneous, simultaneously, simultaneousness, simul-taneity, sin, since, sincerely, sincerity, sine, sine die, sine qua non, sinecure, sinew, sinewy, sinful, sinfully, sing, Singapore, singe, singer, singing, single, single out, single-minded, singlet, singsong,