diff --git a/lang/include/ivy/lang/lex.h b/lang/include/ivy/lang/lex.h
index 40a0ca0..f15ef18 100644
--- a/lang/include/ivy/lang/lex.h
+++ b/lang/include/ivy/lang/lex.h
@@ -34,6 +34,7 @@ enum ivy_keyword {
 	IVY_KW_IF,
 	IVY_KW_AND,
 	IVY_KW_OR,
+	IVY_KW_UNDERSTANDS,
 	IVY_KW_IS,
 	IVY_KW_NOT,
 	IVY_KW_ELSE,
@@ -87,6 +88,7 @@ enum ivy_symbol {
 	IVY_SYM_PIPE_EQUAL,
 	IVY_SYM_PERCENT_EQUAL,
 	IVY_SYM_CARET_EQUAL,
+	IVY_SYM_BANG_EQUAL,
 	IVY_SYM_HASH,
 	IVY_SYM_BANG,
 	IVY_SYM_PIPE,
@@ -130,6 +132,14 @@ IVY_API struct ivy_token *ivy_lexer_peek(struct ivy_lexer *lex);
 IVY_API struct ivy_token *ivy_lexer_read(struct ivy_lexer *lex);
 IVY_API bool ivy_lexer_tokens_available(struct ivy_lexer *lex);
 
+static inline bool ivy_token_is_symbol(struct ivy_token *tok, enum ivy_symbol sym)
+{
+	return (tok->t_type == IVY_TOK_SYMBOL && tok->t_symbol == sym);
+}
+static inline bool ivy_token_is_keyword(struct ivy_token *tok, enum ivy_keyword kw)
+{
+	return (tok->t_type == IVY_TOK_KEYWORD && tok->t_keyword == kw);
+}
 IVY_API void ivy_token_destroy(struct ivy_token *tok);
 
 IVY_API const char *ivy_lex_token_type_to_string(enum ivy_token_type type);
diff --git a/lang/lex.c b/lang/lex.c
index bbbb78a..8d5de34 100644
--- a/lang/lex.c
+++ b/lang/lex.c
@@ -28,6 +28,7 @@ static struct lex_token_def keywords[] = {
 	LEX_TOKEN_DEF(IVY_KW_TRY, "try"),
 	LEX_TOKEN_DEF(IVY_KW_THROW, "throw"),
 	LEX_TOKEN_DEF(IVY_KW_CATCH, "catch"),
+	LEX_TOKEN_DEF(IVY_KW_UNDERSTANDS, "understands"),
 	LEX_TOKEN_DEF(IVY_KW_IF, "if"),
 	LEX_TOKEN_DEF(IVY_KW_AND, "and"),
 	LEX_TOKEN_DEF(IVY_KW_OR, "or"),
@@ -85,6 +86,7 @@ static struct lex_token_def symbols[] = {
 	LEX_TOKEN_DEF(IVY_SYM_PIPE_EQUAL, "|="),
 	LEX_TOKEN_DEF(IVY_SYM_PERCENT_EQUAL, "%="),
 	LEX_TOKEN_DEF(IVY_SYM_CARET_EQUAL, "^="),
+	LEX_TOKEN_DEF(IVY_SYM_BANG_EQUAL, "!="),
 	LEX_TOKEN_DEF(IVY_SYM_HASH, "#"),
 	LEX_TOKEN_DEF(IVY_SYM_BANG, "!"),
 	LEX_TOKEN_DEF(IVY_SYM_PIPE, "|"),