to focus and work hard for a long time
sich konzentrieren und lange Zeit hart arbeiten (zikh konzentrieren und lange tsait hart arbeiten)
"He kept his nose to the grindstone and got promoted."
"Er hielt seine Nase am Schleifstein und wurde befördert." (er hilt zine nase am shlaifshtein und vurde befordert)
to complete or carry out one's duties
When you live honestly, you sleep peacefully without guilt.
to tell many people about something
A visual image can express complex ideas better than words
the most advanced and innovative technology available
to reach a stage of maturity or full potential