Grieve, v. i.
To feel grief; to be in pain of mind on account of an evil; to sorrow; to mourn; -- often followed by at, for, or over. Do not you grieve at this. Shak.
2 other Webster entries under this spelling
Grieve, Greeve, n.
A manager of a farm, or overseer of any work; a reeve; a manorial bailiff. [Scot.] Their children were horsewhipped by the grieve. Sir W. Scott.
Grieve, v. t. [imp. & p. p. Grieved; p. pr. & vb. n. Grieving.]
1. To occasion grief to; to wound the sensibilities of; to make sorrowful; to cause to suffer; to affect; to hurt; to try. Grieve not the Holy Spirit of God. Eph. iv. 30. The maidens grieved themselves at my concern. Cowper,
2. To sorrow over; as, to grieve one's fate. [R.]
Shades of meaning
Fernald has no entry of its own for grieve; he lists it under mourn.
Where he writes about it:
One may grieve or mourn, regret, rue, or sorrow without a sound; he bemoans with suppressed and often inarticulate sounds of grief; he bewails with passionate utterance, whether of inarticulate cries or of spoken words. — from mourn