Certain evergreen is a term used to describe plants that remain green and retain their foliage throughout the year. The crossword solutions for this term are ISLAY (5 letters), FIR (3 letters), PINE (4 letters), and YEW (3 letters). Islay is a type of evergreen shrub or small tree native to western and northern Europe, while FIR is a coniferous evergreen tree. PINE is a coniferous evergreen tree with needle-like leaves, and YEW is an evergreen shrub or tree with flat, dark green needles.