adj.without warning or announcement

"a totally unheralded telegram that his daughter...died last night"

同義詞：unannouncedunpredicted

Lassa fever is unheralded problem in West Africa
The natural history of unheralded complex coronary plaques.
Unheralded urinary tract infection in the male. A clinical and urodynamic assessment.
Genetics and psychiatry: an unheralded window on the environment.
Late Unheralded Pacemaker Pocket Infection Due to Staphylococcus epidermidis: A New Clinical Entity
Kin Family Network: Unheralded Structure in Current Conceptualizations of Family Functioning
State scholarship, loan forgiveness, and related programs: the unheralded safety net
Decrease in mortality from benign prostatic hyperplasia: a major unheralded health triumph
Coronary atherosclerosis in unheralded sudden coronary death under age 50: histo-pathologic comparison with 'healthy' subjects dying...
Identification of patients at increased risk of first unheralded acute myocardial infarction by electron-beam computed tomography.