失准

失准	shī zhǔn	not up to scratch; subpar; off; gone awry / (of an instrument) to be out of kilter / (of a forecast) to be off the mark
失	shī	to lose / to miss / to fail
准	zhǔn	to allow / to grant / in accordance with / in the light of
准	zhǔn	accurate / standard / definitely / certainly / about to become (bride, son-in-law etc) / quasi- / para-